diff --git a/.dart_tool/package_config.json b/.dart_tool/package_config.json
index 9ba9c1ecd90..6a44192e62e 100644
--- a/.dart_tool/package_config.json
+++ b/.dart_tool/package_config.json
@@ -11,7 +11,7 @@
     "constraint, update this by running tools/generate_package_config.dart."
   ],
   "configVersion": 2,
-  "generated": "2021-09-10T11:44:31.694550",
+  "generated": "2021-09-21T21:00:34.058842",
   "generator": "tools/generate_package_config.dart",
   "packages": [
     {
@@ -82,7 +82,7 @@
       "name": "analyzer",
       "rootUri": "../pkg/analyzer",
       "packageUri": "lib/",
-      "languageVersion": "2.12"
+      "languageVersion": "2.14"
     },
     {
       "name": "analyzer_cli",
@@ -476,7 +476,7 @@
       "name": "nnbd_migration",
       "rootUri": "../pkg/nnbd_migration",
       "packageUri": "lib/",
-      "languageVersion": "2.12"
+      "languageVersion": "2.14"
     },
     {
       "name": "oauth2",
diff --git a/pkg/analysis_server/lib/lsp_protocol/protocol_special.dart b/pkg/analysis_server/lib/lsp_protocol/protocol_special.dart
index 8f88db8780d..65c951344ed 100644
--- a/pkg/analysis_server/lib/lsp_protocol/protocol_special.dart
+++ b/pkg/analysis_server/lib/lsp_protocol/protocol_special.dart
@@ -7,7 +7,6 @@ import 'dart:async';
 import 'package:analysis_server/lsp_protocol/protocol_generated.dart';
 import 'package:analysis_server/src/lsp/json_parsing.dart';
 import 'package:analysis_server/src/protocol/protocol_internal.dart';
-import 'package:analyzer/src/generated/utilities_general.dart';
 
 const jsonRpcVersion = '2.0';
 
@@ -36,20 +35,15 @@ bool lspEquals(dynamic obj1, dynamic obj2) {
 /// Returns an objects hash code, recursively combining hashes for items in
 /// Maps/Lists.
 int lspHashCode(dynamic obj) {
-  var hash = 0;
   if (obj is List) {
-    for (var element in obj) {
-      hash = JenkinsSmiHash.combine(hash, lspHashCode(element));
-    }
+    return Object.hashAll(obj.map(lspHashCode));
   } else if (obj is Map) {
-    for (var key in obj.keys) {
-      hash = JenkinsSmiHash.combine(hash, lspHashCode(key));
-      hash = JenkinsSmiHash.combine(hash, lspHashCode(obj[key]));
-    }
+    return Object.hashAll(obj.entries
+        .expand((element) => [element.key, element.value])
+        .map(lspHashCode));
   } else {
-    hash = obj.hashCode;
+    return obj.hashCode;
   }
-  return JenkinsSmiHash.finish(hash);
 }
 
 Object? specToJson(Object? obj) {
diff --git a/pkg/analysis_server/lib/protocol/protocol_generated.dart b/pkg/analysis_server/lib/protocol/protocol_generated.dart
index dcb4e02c6f0..118aac8e6ab 100644
--- a/pkg/analysis_server/lib/protocol/protocol_generated.dart
+++ b/pkg/analysis_server/lib/protocol/protocol_generated.dart
@@ -8,7 +8,6 @@
 
 import 'dart:convert' hide JsonDecoder;
 
-import 'package:analyzer/src/generated/utilities_general.dart';
 import 'package:analysis_server/protocol/protocol.dart';
 import 'package:analysis_server/src/protocol/protocol_internal.dart';
 import 'package:analyzer_plugin/protocol/protocol_common.dart';
@@ -74,11 +73,7 @@ class AnalysisAnalyzedFilesParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, directories.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => directories.hashCode;
 }
 
 /// analysis.closingLabels params
@@ -164,12 +159,10 @@ class AnalysisClosingLabelsParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, labels.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        labels.hashCode,
+      );
 }
 
 /// AnalysisErrorFixes
@@ -240,12 +233,10 @@ class AnalysisErrorFixes implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, error.hashCode);
-    hash = JenkinsSmiHash.combine(hash, fixes.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        error.hashCode,
+        fixes.hashCode,
+      );
 }
 
 /// analysis.errors params
@@ -323,12 +314,10 @@ class AnalysisErrorsParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, errors.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        errors.hashCode,
+      );
 }
 
 /// analysis.flushResults params
@@ -391,11 +380,7 @@ class AnalysisFlushResultsParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, files.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => files.hashCode;
 }
 
 /// analysis.folding params
@@ -473,12 +458,10 @@ class AnalysisFoldingParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, regions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        regions.hashCode,
+      );
 }
 
 /// analysis.getErrors params
@@ -539,11 +522,7 @@ class AnalysisGetErrorsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => file.hashCode;
 }
 
 /// analysis.getErrors result
@@ -612,11 +591,7 @@ class AnalysisGetErrorsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, errors.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => errors.hashCode;
 }
 
 /// analysis.getHover params
@@ -688,12 +663,10 @@ class AnalysisGetHoverParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// analysis.getHover result
@@ -766,11 +739,7 @@ class AnalysisGetHoverResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, hovers.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => hovers.hashCode;
 }
 
 /// analysis.getImportedElements params
@@ -856,13 +825,11 @@ class AnalysisGetImportedElementsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+        length.hashCode,
+      );
 }
 
 /// analysis.getImportedElements result
@@ -933,11 +900,7 @@ class AnalysisGetImportedElementsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, elements.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => elements.hashCode;
 }
 
 /// analysis.getLibraryDependencies params
@@ -961,9 +924,7 @@ class AnalysisGetLibraryDependenciesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    return 246577680;
-  }
+  int get hashCode => 246577680;
 }
 
 /// analysis.getLibraryDependencies result
@@ -1057,12 +1018,10 @@ class AnalysisGetLibraryDependenciesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, libraries.hashCode);
-    hash = JenkinsSmiHash.combine(hash, packageMap.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        libraries.hashCode,
+        packageMap.hashCode,
+      );
 }
 
 /// analysis.getNavigation params
@@ -1150,13 +1109,11 @@ class AnalysisGetNavigationParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+        length.hashCode,
+      );
 }
 
 /// analysis.getNavigation result
@@ -1259,13 +1216,11 @@ class AnalysisGetNavigationResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, files.hashCode);
-    hash = JenkinsSmiHash.combine(hash, targets.hashCode);
-    hash = JenkinsSmiHash.combine(hash, regions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        files.hashCode,
+        targets.hashCode,
+        regions.hashCode,
+      );
 }
 
 /// analysis.getReachableSources params
@@ -1327,11 +1282,7 @@ class AnalysisGetReachableSourcesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => file.hashCode;
 }
 
 /// analysis.getReachableSources result
@@ -1407,11 +1358,7 @@ class AnalysisGetReachableSourcesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, sources.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => sources.hashCode;
 }
 
 /// analysis.getSignature params
@@ -1484,12 +1431,10 @@ class AnalysisGetSignatureParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// analysis.getSignature result
@@ -1590,13 +1535,11 @@ class AnalysisGetSignatureResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameters.hashCode);
-    hash = JenkinsSmiHash.combine(hash, dartdoc.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        name.hashCode,
+        parameters.hashCode,
+        dartdoc.hashCode,
+      );
 }
 
 /// analysis.highlights params
@@ -1678,12 +1621,10 @@ class AnalysisHighlightsParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, regions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        regions.hashCode,
+      );
 }
 
 /// analysis.implemented params
@@ -1780,13 +1721,11 @@ class AnalysisImplementedParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, classes.hashCode);
-    hash = JenkinsSmiHash.combine(hash, members.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        classes.hashCode,
+        members.hashCode,
+      );
 }
 
 /// analysis.invalidate params
@@ -1884,14 +1823,12 @@ class AnalysisInvalidateParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, delta.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+        length.hashCode,
+        delta.hashCode,
+      );
 }
 
 /// analysis.navigation params
@@ -2008,14 +1945,12 @@ class AnalysisNavigationParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, regions.hashCode);
-    hash = JenkinsSmiHash.combine(hash, targets.hashCode);
-    hash = JenkinsSmiHash.combine(hash, files.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        regions.hashCode,
+        targets.hashCode,
+        files.hashCode,
+      );
 }
 
 /// analysis.occurrences params
@@ -2094,12 +2029,10 @@ class AnalysisOccurrencesParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, occurrences.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        occurrences.hashCode,
+      );
 }
 
 /// AnalysisOptions
@@ -2282,18 +2215,16 @@ class AnalysisOptions implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, enableAsync.hashCode);
-    hash = JenkinsSmiHash.combine(hash, enableDeferredLoading.hashCode);
-    hash = JenkinsSmiHash.combine(hash, enableEnums.hashCode);
-    hash = JenkinsSmiHash.combine(hash, enableNullAwareOperators.hashCode);
-    hash = JenkinsSmiHash.combine(hash, enableSuperMixins.hashCode);
-    hash = JenkinsSmiHash.combine(hash, generateDart2jsHints.hashCode);
-    hash = JenkinsSmiHash.combine(hash, generateHints.hashCode);
-    hash = JenkinsSmiHash.combine(hash, generateLints.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        enableAsync.hashCode,
+        enableDeferredLoading.hashCode,
+        enableEnums.hashCode,
+        enableNullAwareOperators.hashCode,
+        enableSuperMixins.hashCode,
+        generateDart2jsHints.hashCode,
+        generateHints.hashCode,
+        generateLints.hashCode,
+      );
 }
 
 /// analysis.outline params
@@ -2397,14 +2328,12 @@ class AnalysisOutlineParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, libraryName.hashCode);
-    hash = JenkinsSmiHash.combine(hash, outline.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        kind.hashCode,
+        libraryName.hashCode,
+        outline.hashCode,
+      );
 }
 
 /// analysis.overrides params
@@ -2482,12 +2411,10 @@ class AnalysisOverridesParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, overrides.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        overrides.hashCode,
+      );
 }
 
 /// analysis.reanalyze params
@@ -2511,9 +2438,7 @@ class AnalysisReanalyzeParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    return 613039876;
-  }
+  int get hashCode => 613039876;
 }
 
 /// analysis.reanalyze result
@@ -2537,9 +2462,7 @@ class AnalysisReanalyzeResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 846803925;
-  }
+  int get hashCode => 846803925;
 }
 
 /// AnalysisService
@@ -2743,13 +2666,11 @@ class AnalysisSetAnalysisRootsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, included.hashCode);
-    hash = JenkinsSmiHash.combine(hash, excluded.hashCode);
-    hash = JenkinsSmiHash.combine(hash, packageRoots.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        included.hashCode,
+        excluded.hashCode,
+        packageRoots.hashCode,
+      );
 }
 
 /// analysis.setAnalysisRoots result
@@ -2773,9 +2694,7 @@ class AnalysisSetAnalysisRootsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 866004753;
-  }
+  int get hashCode => 866004753;
 }
 
 /// analysis.setGeneralSubscriptions params
@@ -2844,11 +2763,7 @@ class AnalysisSetGeneralSubscriptionsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, subscriptions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => subscriptions.hashCode;
 }
 
 /// analysis.setGeneralSubscriptions result
@@ -2872,9 +2787,7 @@ class AnalysisSetGeneralSubscriptionsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 386759562;
-  }
+  int get hashCode => 386759562;
 }
 
 /// analysis.setPriorityFiles params
@@ -2937,11 +2850,7 @@ class AnalysisSetPriorityFilesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, files.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => files.hashCode;
 }
 
 /// analysis.setPriorityFiles result
@@ -2965,9 +2874,7 @@ class AnalysisSetPriorityFilesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 330050055;
-  }
+  int get hashCode => 330050055;
 }
 
 /// analysis.setSubscriptions params
@@ -3040,11 +2947,7 @@ class AnalysisSetSubscriptionsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, subscriptions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => subscriptions.hashCode;
 }
 
 /// analysis.setSubscriptions result
@@ -3068,9 +2971,7 @@ class AnalysisSetSubscriptionsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 218088493;
-  }
+  int get hashCode => 218088493;
 }
 
 /// AnalysisStatus
@@ -3137,12 +3038,10 @@ class AnalysisStatus implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, isAnalyzing.hashCode);
-    hash = JenkinsSmiHash.combine(hash, analysisTarget.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        isAnalyzing.hashCode,
+        analysisTarget.hashCode,
+      );
 }
 
 /// analysis.updateContent params
@@ -3216,11 +3115,7 @@ class AnalysisUpdateContentParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, files.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => files.hashCode;
 }
 
 /// analysis.updateContent result
@@ -3273,10 +3168,7 @@ class AnalysisUpdateContentResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => 0;
 }
 
 /// analysis.updateOptions params
@@ -3339,11 +3231,7 @@ class AnalysisUpdateOptionsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, options.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => options.hashCode;
 }
 
 /// analysis.updateOptions result
@@ -3367,9 +3255,7 @@ class AnalysisUpdateOptionsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 179689467;
-  }
+  int get hashCode => 179689467;
 }
 
 /// analytics.enable params
@@ -3430,11 +3316,7 @@ class AnalyticsEnableParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, value.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => value.hashCode;
 }
 
 /// analytics.enable result
@@ -3458,9 +3340,7 @@ class AnalyticsEnableResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 237990792;
-  }
+  int get hashCode => 237990792;
 }
 
 /// analytics.isEnabled params
@@ -3484,9 +3364,7 @@ class AnalyticsIsEnabledParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    return 57215544;
-  }
+  int get hashCode => 57215544;
 }
 
 /// analytics.isEnabled result
@@ -3550,11 +3428,7 @@ class AnalyticsIsEnabledResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, enabled.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => enabled.hashCode;
 }
 
 /// analytics.sendEvent params
@@ -3615,11 +3489,7 @@ class AnalyticsSendEventParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, action.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => action.hashCode;
 }
 
 /// analytics.sendEvent result
@@ -3643,9 +3513,7 @@ class AnalyticsSendEventResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 227063188;
-  }
+  int get hashCode => 227063188;
 }
 
 /// analytics.sendTiming params
@@ -3717,12 +3585,10 @@ class AnalyticsSendTimingParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, event.hashCode);
-    hash = JenkinsSmiHash.combine(hash, millis.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        event.hashCode,
+        millis.hashCode,
+      );
 }
 
 /// analytics.sendTiming result
@@ -3746,9 +3612,7 @@ class AnalyticsSendTimingResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 875010924;
-  }
+  int get hashCode => 875010924;
 }
 
 /// AvailableSuggestion
@@ -3941,19 +3805,17 @@ class AvailableSuggestion implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, label.hashCode);
-    hash = JenkinsSmiHash.combine(hash, declaringLibraryUri.hashCode);
-    hash = JenkinsSmiHash.combine(hash, element.hashCode);
-    hash = JenkinsSmiHash.combine(hash, defaultArgumentListString.hashCode);
-    hash = JenkinsSmiHash.combine(hash, defaultArgumentListTextRanges.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameterNames.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameterTypes.hashCode);
-    hash = JenkinsSmiHash.combine(hash, relevanceTags.hashCode);
-    hash = JenkinsSmiHash.combine(hash, requiredParameterCount.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        label.hashCode,
+        declaringLibraryUri.hashCode,
+        element.hashCode,
+        defaultArgumentListString.hashCode,
+        defaultArgumentListTextRanges.hashCode,
+        parameterNames.hashCode,
+        parameterTypes.hashCode,
+        relevanceTags.hashCode,
+        requiredParameterCount.hashCode,
+      );
 }
 
 /// AvailableSuggestionSet
@@ -4033,13 +3895,11 @@ class AvailableSuggestionSet implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    hash = JenkinsSmiHash.combine(hash, uri.hashCode);
-    hash = JenkinsSmiHash.combine(hash, items.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        id.hashCode,
+        uri.hashCode,
+        items.hashCode,
+      );
 }
 
 /// BulkFix
@@ -4108,12 +3968,10 @@ class BulkFix implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, path.hashCode);
-    hash = JenkinsSmiHash.combine(hash, fixes.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        path.hashCode,
+        fixes.hashCode,
+      );
 }
 
 /// BulkFixDetail
@@ -4177,12 +4035,10 @@ class BulkFixDetail implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, code.hashCode);
-    hash = JenkinsSmiHash.combine(hash, occurrences.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        code.hashCode,
+        occurrences.hashCode,
+      );
 }
 
 /// ClosingLabel
@@ -4258,13 +4114,11 @@ class ClosingLabel implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, label.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+        label.hashCode,
+      );
 }
 
 /// completion.availableSuggestions params
@@ -4355,12 +4209,10 @@ class CompletionAvailableSuggestionsParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, changedLibraries.hashCode);
-    hash = JenkinsSmiHash.combine(hash, removedLibraries.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        changedLibraries.hashCode,
+        removedLibraries.hashCode,
+      );
 }
 
 /// completion.existingImports params
@@ -4434,12 +4286,10 @@ class CompletionExistingImportsParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, imports.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        imports.hashCode,
+      );
 }
 
 /// completion.getSuggestionDetails params
@@ -4540,14 +4390,12 @@ class CompletionGetSuggestionDetailsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    hash = JenkinsSmiHash.combine(hash, label.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        id.hashCode,
+        label.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// completion.getSuggestionDetails result
@@ -4627,12 +4475,10 @@ class CompletionGetSuggestionDetailsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, completion.hashCode);
-    hash = JenkinsSmiHash.combine(hash, change.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        completion.hashCode,
+        change.hashCode,
+      );
 }
 
 /// completion.getSuggestions params
@@ -4705,12 +4551,10 @@ class CompletionGetSuggestionsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// completion.getSuggestions result
@@ -4774,11 +4618,7 @@ class CompletionGetSuggestionsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => id.hashCode;
 }
 
 /// completion.registerLibraryPaths params
@@ -4849,11 +4689,7 @@ class CompletionRegisterLibraryPathsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, paths.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => paths.hashCode;
 }
 
 /// completion.registerLibraryPaths result
@@ -4877,9 +4713,7 @@ class CompletionRegisterLibraryPathsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 104675661;
-  }
+  int get hashCode => 104675661;
 }
 
 /// completion.results params
@@ -5111,20 +4945,17 @@ class CompletionResultsParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    hash = JenkinsSmiHash.combine(hash, replacementOffset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, replacementLength.hashCode);
-    hash = JenkinsSmiHash.combine(hash, results.hashCode);
-    hash = JenkinsSmiHash.combine(hash, isLast.hashCode);
-    hash = JenkinsSmiHash.combine(hash, libraryFile.hashCode);
-    hash = JenkinsSmiHash.combine(hash, includedSuggestionSets.hashCode);
-    hash = JenkinsSmiHash.combine(hash, includedElementKinds.hashCode);
-    hash =
-        JenkinsSmiHash.combine(hash, includedSuggestionRelevanceTags.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        id.hashCode,
+        replacementOffset.hashCode,
+        replacementLength.hashCode,
+        results.hashCode,
+        isLast.hashCode,
+        libraryFile.hashCode,
+        includedSuggestionSets.hashCode,
+        includedElementKinds.hashCode,
+        includedSuggestionRelevanceTags.hashCode,
+      );
 }
 
 /// CompletionService
@@ -5246,11 +5077,7 @@ class CompletionSetSubscriptionsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, subscriptions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => subscriptions.hashCode;
 }
 
 /// completion.setSubscriptions result
@@ -5274,9 +5101,7 @@ class CompletionSetSubscriptionsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 2482770;
-  }
+  int get hashCode => 2482770;
 }
 
 /// ContextData
@@ -5384,15 +5209,13 @@ class ContextData implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, explicitFileCount.hashCode);
-    hash = JenkinsSmiHash.combine(hash, implicitFileCount.hashCode);
-    hash = JenkinsSmiHash.combine(hash, workItemQueueLength.hashCode);
-    hash = JenkinsSmiHash.combine(hash, cacheEntryExceptions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        name.hashCode,
+        explicitFileCount.hashCode,
+        implicitFileCount.hashCode,
+        workItemQueueLength.hashCode,
+        cacheEntryExceptions.hashCode,
+      );
 }
 
 /// convertGetterToMethod feedback
@@ -5409,9 +5232,7 @@ class ConvertGetterToMethodFeedback extends RefactoringFeedback
   }
 
   @override
-  int get hashCode {
-    return 616032599;
-  }
+  int get hashCode => 616032599;
 }
 
 /// convertGetterToMethod options
@@ -5428,9 +5249,7 @@ class ConvertGetterToMethodOptions extends RefactoringOptions
   }
 
   @override
-  int get hashCode {
-    return 488848400;
-  }
+  int get hashCode => 488848400;
 }
 
 /// convertMethodToGetter feedback
@@ -5447,9 +5266,7 @@ class ConvertMethodToGetterFeedback extends RefactoringFeedback
   }
 
   @override
-  int get hashCode {
-    return 165291526;
-  }
+  int get hashCode => 165291526;
 }
 
 /// convertMethodToGetter options
@@ -5466,9 +5283,7 @@ class ConvertMethodToGetterOptions extends RefactoringOptions
   }
 
   @override
-  int get hashCode {
-    return 27952290;
-  }
+  int get hashCode => 27952290;
 }
 
 /// diagnostic.getDiagnostics params
@@ -5492,9 +5307,7 @@ class DiagnosticGetDiagnosticsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    return 587526202;
-  }
+  int get hashCode => 587526202;
 }
 
 /// diagnostic.getDiagnostics result
@@ -5564,11 +5377,7 @@ class DiagnosticGetDiagnosticsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, contexts.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => contexts.hashCode;
 }
 
 /// diagnostic.getServerPort params
@@ -5592,9 +5401,7 @@ class DiagnosticGetServerPortParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    return 367508704;
-  }
+  int get hashCode => 367508704;
 }
 
 /// diagnostic.getServerPort result
@@ -5658,11 +5465,7 @@ class DiagnosticGetServerPortResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, port.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => port.hashCode;
 }
 
 /// edit.bulkFixes params
@@ -5751,12 +5554,10 @@ class EditBulkFixesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, included.hashCode);
-    hash = JenkinsSmiHash.combine(hash, inTestMode.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        included.hashCode,
+        inTestMode.hashCode,
+      );
 }
 
 /// edit.bulkFixes result
@@ -5841,12 +5642,10 @@ class EditBulkFixesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, edits.hashCode);
-    hash = JenkinsSmiHash.combine(hash, details.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        edits.hashCode,
+        details.hashCode,
+      );
 }
 
 /// edit.format params
@@ -5949,14 +5748,12 @@ class EditFormatParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, selectionOffset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, selectionLength.hashCode);
-    hash = JenkinsSmiHash.combine(hash, lineLength.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        selectionOffset.hashCode,
+        selectionLength.hashCode,
+        lineLength.hashCode,
+      );
 }
 
 /// edit.format result
@@ -6051,13 +5848,11 @@ class EditFormatResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, edits.hashCode);
-    hash = JenkinsSmiHash.combine(hash, selectionOffset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, selectionLength.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        edits.hashCode,
+        selectionOffset.hashCode,
+        selectionLength.hashCode,
+      );
 }
 
 /// edit.getAssists params
@@ -6142,13 +5937,11 @@ class EditGetAssistsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+        length.hashCode,
+      );
 }
 
 /// edit.getAssists result
@@ -6217,11 +6010,7 @@ class EditGetAssistsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, assists.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => assists.hashCode;
 }
 
 /// edit.getAvailableRefactorings params
@@ -6307,13 +6096,11 @@ class EditGetAvailableRefactoringsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+        length.hashCode,
+      );
 }
 
 /// edit.getAvailableRefactorings result
@@ -6383,11 +6170,7 @@ class EditGetAvailableRefactoringsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, kinds.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => kinds.hashCode;
 }
 
 /// edit.getFixes params
@@ -6459,12 +6242,10 @@ class EditGetFixesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// edit.getFixes result
@@ -6533,11 +6314,7 @@ class EditGetFixesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, fixes.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => fixes.hashCode;
 }
 
 /// edit.getPostfixCompletion params
@@ -6622,13 +6399,11 @@ class EditGetPostfixCompletionParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, key.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        key.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// edit.getPostfixCompletion result
@@ -6693,11 +6468,7 @@ class EditGetPostfixCompletionResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, change.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => change.hashCode;
 }
 
 /// edit.getRefactoring params
@@ -6832,16 +6603,14 @@ class EditGetRefactoringParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, validateOnly.hashCode);
-    hash = JenkinsSmiHash.combine(hash, options.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        kind.hashCode,
+        file.hashCode,
+        offset.hashCode,
+        length.hashCode,
+        validateOnly.hashCode,
+        options.hashCode,
+      );
 }
 
 /// edit.getRefactoring result
@@ -7014,16 +6783,14 @@ class EditGetRefactoringResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, initialProblems.hashCode);
-    hash = JenkinsSmiHash.combine(hash, optionsProblems.hashCode);
-    hash = JenkinsSmiHash.combine(hash, finalProblems.hashCode);
-    hash = JenkinsSmiHash.combine(hash, feedback.hashCode);
-    hash = JenkinsSmiHash.combine(hash, change.hashCode);
-    hash = JenkinsSmiHash.combine(hash, potentialEdits.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        initialProblems.hashCode,
+        optionsProblems.hashCode,
+        finalProblems.hashCode,
+        feedback.hashCode,
+        change.hashCode,
+        potentialEdits.hashCode,
+      );
 }
 
 /// edit.getStatementCompletion params
@@ -7096,12 +6863,10 @@ class EditGetStatementCompletionParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// edit.getStatementCompletion result
@@ -7179,12 +6944,10 @@ class EditGetStatementCompletionResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, change.hashCode);
-    hash = JenkinsSmiHash.combine(hash, whitespaceOnly.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        change.hashCode,
+        whitespaceOnly.hashCode,
+      );
 }
 
 /// edit.importElements params
@@ -7279,13 +7042,11 @@ class EditImportElementsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, elements.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        elements.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// edit.importElements result
@@ -7355,11 +7116,7 @@ class EditImportElementsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, edit.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => edit.hashCode;
 }
 
 /// edit.isPostfixCompletionApplicable params
@@ -7444,13 +7201,11 @@ class EditIsPostfixCompletionApplicableParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, key.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        key.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// edit.isPostfixCompletionApplicable result
@@ -7515,11 +7270,7 @@ class EditIsPostfixCompletionApplicableResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, value.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => value.hashCode;
 }
 
 /// edit.listPostfixCompletionTemplates params
@@ -7543,9 +7294,7 @@ class EditListPostfixCompletionTemplatesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    return 690713107;
-  }
+  int get hashCode => 690713107;
 }
 
 /// edit.listPostfixCompletionTemplates result
@@ -7618,11 +7367,7 @@ class EditListPostfixCompletionTemplatesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, templates.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => templates.hashCode;
 }
 
 /// edit.organizeDirectives params
@@ -7684,11 +7429,7 @@ class EditOrganizeDirectivesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => file.hashCode;
 }
 
 /// edit.organizeDirectives result
@@ -7754,11 +7495,7 @@ class EditOrganizeDirectivesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, edit.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => edit.hashCode;
 }
 
 /// edit.sortMembers params
@@ -7819,11 +7556,7 @@ class EditSortMembersParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => file.hashCode;
 }
 
 /// edit.sortMembers result
@@ -7888,11 +7621,7 @@ class EditSortMembersResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, edit.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => edit.hashCode;
 }
 
 /// ElementDeclaration
@@ -8084,21 +7813,19 @@ class ElementDeclaration implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, fileIndex.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, line.hashCode);
-    hash = JenkinsSmiHash.combine(hash, column.hashCode);
-    hash = JenkinsSmiHash.combine(hash, codeOffset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, codeLength.hashCode);
-    hash = JenkinsSmiHash.combine(hash, className.hashCode);
-    hash = JenkinsSmiHash.combine(hash, mixinName.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameters.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        name.hashCode,
+        kind.hashCode,
+        fileIndex.hashCode,
+        offset.hashCode,
+        line.hashCode,
+        column.hashCode,
+        codeOffset.hashCode,
+        codeLength.hashCode,
+        className.hashCode,
+        mixinName.hashCode,
+        parameters.hashCode,
+      );
 }
 
 /// ExecutableFile
@@ -8161,12 +7888,10 @@ class ExecutableFile implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        kind.hashCode,
+      );
 }
 
 /// ExecutableKind
@@ -8295,11 +8020,7 @@ class ExecutionCreateContextParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, contextRoot.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => contextRoot.hashCode;
 }
 
 /// execution.createContext result
@@ -8363,11 +8084,7 @@ class ExecutionCreateContextResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => id.hashCode;
 }
 
 /// execution.deleteContext params
@@ -8429,11 +8146,7 @@ class ExecutionDeleteContextParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => id.hashCode;
 }
 
 /// execution.deleteContext result
@@ -8457,9 +8170,7 @@ class ExecutionDeleteContextResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 479954425;
-  }
+  int get hashCode => 479954425;
 }
 
 /// execution.getSuggestions params
@@ -8623,16 +8334,14 @@ class ExecutionGetSuggestionsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, code.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, contextFile.hashCode);
-    hash = JenkinsSmiHash.combine(hash, contextOffset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, variables.hashCode);
-    hash = JenkinsSmiHash.combine(hash, expressions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        code.hashCode,
+        offset.hashCode,
+        contextFile.hashCode,
+        contextOffset.hashCode,
+        variables.hashCode,
+        expressions.hashCode,
+      );
 }
 
 /// execution.getSuggestions result
@@ -8739,12 +8448,10 @@ class ExecutionGetSuggestionsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, suggestions.hashCode);
-    hash = JenkinsSmiHash.combine(hash, expressions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        suggestions.hashCode,
+        expressions.hashCode,
+      );
 }
 
 /// execution.launchData params
@@ -8838,13 +8545,11 @@ class ExecutionLaunchDataParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, referencedFiles.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        kind.hashCode,
+        referencedFiles.hashCode,
+      );
 }
 
 /// execution.mapUri params
@@ -8929,13 +8634,11 @@ class ExecutionMapUriParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, uri.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        id.hashCode,
+        file.hashCode,
+        uri.hashCode,
+      );
 }
 
 /// execution.mapUri result
@@ -9013,12 +8716,10 @@ class ExecutionMapUriResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, uri.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        uri.hashCode,
+      );
 }
 
 /// ExecutionService
@@ -9130,11 +8831,7 @@ class ExecutionSetSubscriptionsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, subscriptions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => subscriptions.hashCode;
 }
 
 /// execution.setSubscriptions result
@@ -9158,9 +8855,7 @@ class ExecutionSetSubscriptionsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 287678780;
-  }
+  int get hashCode => 287678780;
 }
 
 /// ExistingImport
@@ -9225,12 +8920,10 @@ class ExistingImport implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, uri.hashCode);
-    hash = JenkinsSmiHash.combine(hash, elements.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        uri.hashCode,
+        elements.hashCode,
+      );
 }
 
 /// ExistingImports
@@ -9300,12 +8993,10 @@ class ExistingImports implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, elements.hashCode);
-    hash = JenkinsSmiHash.combine(hash, imports.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        elements.hashCode,
+        imports.hashCode,
+      );
 }
 
 /// extractLocalVariable feedback
@@ -9427,15 +9118,13 @@ class ExtractLocalVariableFeedback extends RefactoringFeedback {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, coveringExpressionOffsets.hashCode);
-    hash = JenkinsSmiHash.combine(hash, coveringExpressionLengths.hashCode);
-    hash = JenkinsSmiHash.combine(hash, names.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offsets.hashCode);
-    hash = JenkinsSmiHash.combine(hash, lengths.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        coveringExpressionOffsets.hashCode,
+        coveringExpressionLengths.hashCode,
+        names.hashCode,
+        offsets.hashCode,
+        lengths.hashCode,
+      );
 }
 
 /// extractLocalVariable options
@@ -9508,12 +9197,10 @@ class ExtractLocalVariableOptions extends RefactoringOptions {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, extractAll.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        name.hashCode,
+        extractAll.hashCode,
+      );
 }
 
 /// extractMethod feedback
@@ -9673,18 +9360,16 @@ class ExtractMethodFeedback extends RefactoringFeedback {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, returnType.hashCode);
-    hash = JenkinsSmiHash.combine(hash, names.hashCode);
-    hash = JenkinsSmiHash.combine(hash, canCreateGetter.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameters.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offsets.hashCode);
-    hash = JenkinsSmiHash.combine(hash, lengths.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+        returnType.hashCode,
+        names.hashCode,
+        canCreateGetter.hashCode,
+        parameters.hashCode,
+        offsets.hashCode,
+        lengths.hashCode,
+      );
 }
 
 /// extractMethod options
@@ -9817,15 +9502,13 @@ class ExtractMethodOptions extends RefactoringOptions {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, returnType.hashCode);
-    hash = JenkinsSmiHash.combine(hash, createGetter.hashCode);
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameters.hashCode);
-    hash = JenkinsSmiHash.combine(hash, extractAll.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        returnType.hashCode,
+        createGetter.hashCode,
+        name.hashCode,
+        parameters.hashCode,
+        extractAll.hashCode,
+      );
 }
 
 /// extractWidget feedback
@@ -9865,10 +9548,7 @@ class ExtractWidgetFeedback extends RefactoringFeedback {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => 0;
 }
 
 /// extractWidget options
@@ -9925,11 +9605,7 @@ class ExtractWidgetOptions extends RefactoringOptions {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => name.hashCode;
 }
 
 /// FileKind
@@ -10051,12 +9727,10 @@ class FlutterGetWidgetDescriptionParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// flutter.getWidgetDescription result
@@ -10130,11 +9804,7 @@ class FlutterGetWidgetDescriptionResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, properties.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => properties.hashCode;
 }
 
 /// FlutterOutline
@@ -10374,22 +10044,20 @@ class FlutterOutline implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, codeOffset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, codeLength.hashCode);
-    hash = JenkinsSmiHash.combine(hash, label.hashCode);
-    hash = JenkinsSmiHash.combine(hash, dartElement.hashCode);
-    hash = JenkinsSmiHash.combine(hash, attributes.hashCode);
-    hash = JenkinsSmiHash.combine(hash, className.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parentAssociationLabel.hashCode);
-    hash = JenkinsSmiHash.combine(hash, variableName.hashCode);
-    hash = JenkinsSmiHash.combine(hash, children.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        kind.hashCode,
+        offset.hashCode,
+        length.hashCode,
+        codeOffset.hashCode,
+        codeLength.hashCode,
+        label.hashCode,
+        dartElement.hashCode,
+        attributes.hashCode,
+        className.hashCode,
+        parentAssociationLabel.hashCode,
+        variableName.hashCode,
+        children.hashCode,
+      );
 }
 
 /// FlutterOutlineAttribute
@@ -10540,17 +10208,15 @@ class FlutterOutlineAttribute implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, label.hashCode);
-    hash = JenkinsSmiHash.combine(hash, literalValueBoolean.hashCode);
-    hash = JenkinsSmiHash.combine(hash, literalValueInteger.hashCode);
-    hash = JenkinsSmiHash.combine(hash, literalValueString.hashCode);
-    hash = JenkinsSmiHash.combine(hash, nameLocation.hashCode);
-    hash = JenkinsSmiHash.combine(hash, valueLocation.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        name.hashCode,
+        label.hashCode,
+        literalValueBoolean.hashCode,
+        literalValueInteger.hashCode,
+        literalValueString.hashCode,
+        nameLocation.hashCode,
+        valueLocation.hashCode,
+      );
 }
 
 /// FlutterOutlineKind
@@ -10710,12 +10376,10 @@ class FlutterOutlineParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, outline.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        outline.hashCode,
+      );
 }
 
 /// FlutterService
@@ -10832,11 +10496,7 @@ class FlutterSetSubscriptionsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, subscriptions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => subscriptions.hashCode;
 }
 
 /// flutter.setSubscriptions result
@@ -10860,9 +10520,7 @@ class FlutterSetSubscriptionsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 628296315;
-  }
+  int get hashCode => 628296315;
 }
 
 /// flutter.setWidgetPropertyValue params
@@ -10949,12 +10607,10 @@ class FlutterSetWidgetPropertyValueParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    hash = JenkinsSmiHash.combine(hash, value.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        id.hashCode,
+        value.hashCode,
+      );
 }
 
 /// flutter.setWidgetPropertyValue result
@@ -11019,11 +10675,7 @@ class FlutterSetWidgetPropertyValueResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, change.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => change.hashCode;
 }
 
 /// FlutterWidgetProperty
@@ -11214,19 +10866,17 @@ class FlutterWidgetProperty implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, documentation.hashCode);
-    hash = JenkinsSmiHash.combine(hash, expression.hashCode);
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    hash = JenkinsSmiHash.combine(hash, isRequired.hashCode);
-    hash = JenkinsSmiHash.combine(hash, isSafeToUpdate.hashCode);
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, children.hashCode);
-    hash = JenkinsSmiHash.combine(hash, editor.hashCode);
-    hash = JenkinsSmiHash.combine(hash, value.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        documentation.hashCode,
+        expression.hashCode,
+        id.hashCode,
+        isRequired.hashCode,
+        isSafeToUpdate.hashCode,
+        name.hashCode,
+        children.hashCode,
+        editor.hashCode,
+        value.hashCode,
+      );
 }
 
 /// FlutterWidgetPropertyEditor
@@ -11301,12 +10951,10 @@ class FlutterWidgetPropertyEditor implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, enumItems.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        kind.hashCode,
+        enumItems.hashCode,
+      );
 }
 
 /// FlutterWidgetPropertyEditorKind
@@ -11529,16 +11177,14 @@ class FlutterWidgetPropertyValue implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, boolValue.hashCode);
-    hash = JenkinsSmiHash.combine(hash, doubleValue.hashCode);
-    hash = JenkinsSmiHash.combine(hash, intValue.hashCode);
-    hash = JenkinsSmiHash.combine(hash, stringValue.hashCode);
-    hash = JenkinsSmiHash.combine(hash, enumValue.hashCode);
-    hash = JenkinsSmiHash.combine(hash, expression.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        boolValue.hashCode,
+        doubleValue.hashCode,
+        intValue.hashCode,
+        stringValue.hashCode,
+        enumValue.hashCode,
+        expression.hashCode,
+      );
 }
 
 /// FlutterWidgetPropertyValueEnumItem
@@ -11637,14 +11283,12 @@ class FlutterWidgetPropertyValueEnumItem implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, libraryUri.hashCode);
-    hash = JenkinsSmiHash.combine(hash, className.hashCode);
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, documentation.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        libraryUri.hashCode,
+        className.hashCode,
+        name.hashCode,
+        documentation.hashCode,
+      );
 }
 
 /// GeneralAnalysisService
@@ -11935,22 +11579,20 @@ class HoverInformation implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, containingLibraryPath.hashCode);
-    hash = JenkinsSmiHash.combine(hash, containingLibraryName.hashCode);
-    hash = JenkinsSmiHash.combine(hash, containingClassDescription.hashCode);
-    hash = JenkinsSmiHash.combine(hash, dartdoc.hashCode);
-    hash = JenkinsSmiHash.combine(hash, elementDescription.hashCode);
-    hash = JenkinsSmiHash.combine(hash, elementKind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, isDeprecated.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameter.hashCode);
-    hash = JenkinsSmiHash.combine(hash, propagatedType.hashCode);
-    hash = JenkinsSmiHash.combine(hash, staticType.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+        containingLibraryPath.hashCode,
+        containingLibraryName.hashCode,
+        containingClassDescription.hashCode,
+        dartdoc.hashCode,
+        elementDescription.hashCode,
+        elementKind.hashCode,
+        isDeprecated.hashCode,
+        parameter.hashCode,
+        propagatedType.hashCode,
+        staticType.hashCode,
+      );
 }
 
 /// ImplementedClass
@@ -12012,12 +11654,10 @@ class ImplementedClass implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+      );
 }
 
 /// ImplementedMember
@@ -12079,12 +11719,10 @@ class ImplementedMember implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+      );
 }
 
 /// ImportedElementSet
@@ -12163,13 +11801,11 @@ class ImportedElementSet implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, strings.hashCode);
-    hash = JenkinsSmiHash.combine(hash, uris.hashCode);
-    hash = JenkinsSmiHash.combine(hash, names.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        strings.hashCode,
+        uris.hashCode,
+        names.hashCode,
+      );
 }
 
 /// ImportedElements
@@ -12246,13 +11882,11 @@ class ImportedElements implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, path.hashCode);
-    hash = JenkinsSmiHash.combine(hash, prefix.hashCode);
-    hash = JenkinsSmiHash.combine(hash, elements.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        path.hashCode,
+        prefix.hashCode,
+        elements.hashCode,
+      );
 }
 
 /// IncludedSuggestionRelevanceTag
@@ -12318,12 +11952,10 @@ class IncludedSuggestionRelevanceTag implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, tag.hashCode);
-    hash = JenkinsSmiHash.combine(hash, relevanceBoost.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        tag.hashCode,
+        relevanceBoost.hashCode,
+      );
 }
 
 /// IncludedSuggestionSet
@@ -12409,13 +12041,11 @@ class IncludedSuggestionSet implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    hash = JenkinsSmiHash.combine(hash, relevance.hashCode);
-    hash = JenkinsSmiHash.combine(hash, displayUri.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        id.hashCode,
+        relevance.hashCode,
+        displayUri.hashCode,
+      );
 }
 
 /// inlineLocalVariable feedback
@@ -12479,12 +12109,10 @@ class InlineLocalVariableFeedback extends RefactoringFeedback {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, occurrences.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        name.hashCode,
+        occurrences.hashCode,
+      );
 }
 
 /// inlineLocalVariable options
@@ -12501,9 +12129,7 @@ class InlineLocalVariableOptions extends RefactoringOptions
   }
 
   @override
-  int get hashCode {
-    return 540364977;
-  }
+  int get hashCode => 540364977;
 }
 
 /// inlineMethod feedback
@@ -12585,13 +12211,11 @@ class InlineMethodFeedback extends RefactoringFeedback {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, className.hashCode);
-    hash = JenkinsSmiHash.combine(hash, methodName.hashCode);
-    hash = JenkinsSmiHash.combine(hash, isDeclaration.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        className.hashCode,
+        methodName.hashCode,
+        isDeclaration.hashCode,
+      );
 }
 
 /// inlineMethod options
@@ -12663,12 +12287,10 @@ class InlineMethodOptions extends RefactoringOptions {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, deleteSource.hashCode);
-    hash = JenkinsSmiHash.combine(hash, inlineAll.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        deleteSource.hashCode,
+        inlineAll.hashCode,
+      );
 }
 
 /// kythe.getKytheEntries params
@@ -12731,11 +12353,7 @@ class KytheGetKytheEntriesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => file.hashCode;
 }
 
 /// kythe.getKytheEntries result
@@ -12821,12 +12439,10 @@ class KytheGetKytheEntriesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, entries.hashCode);
-    hash = JenkinsSmiHash.combine(hash, files.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        entries.hashCode,
+        files.hashCode,
+      );
 }
 
 /// LibraryPathSet
@@ -12894,12 +12510,10 @@ class LibraryPathSet implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, scope.hashCode);
-    hash = JenkinsSmiHash.combine(hash, libraryPaths.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        scope.hashCode,
+        libraryPaths.hashCode,
+      );
 }
 
 /// moveFile feedback
@@ -12915,9 +12529,7 @@ class MoveFileFeedback extends RefactoringFeedback implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    return 438975893;
-  }
+  int get hashCode => 438975893;
 }
 
 /// moveFile options
@@ -12975,11 +12587,7 @@ class MoveFileOptions extends RefactoringOptions {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, newFile.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => newFile.hashCode;
 }
 
 /// OverriddenMember
@@ -13043,12 +12651,10 @@ class OverriddenMember implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, element.hashCode);
-    hash = JenkinsSmiHash.combine(hash, className.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        element.hashCode,
+        className.hashCode,
+      );
 }
 
 /// Override
@@ -13152,14 +12758,12 @@ class Override implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, superclassMember.hashCode);
-    hash = JenkinsSmiHash.combine(hash, interfaceMembers.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+        superclassMember.hashCode,
+        interfaceMembers.hashCode,
+      );
 }
 
 /// PostfixTemplateDescriptor
@@ -13234,13 +12838,11 @@ class PostfixTemplateDescriptor implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, key.hashCode);
-    hash = JenkinsSmiHash.combine(hash, example.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        name.hashCode,
+        key.hashCode,
+        example.hashCode,
+      );
 }
 
 /// PubStatus
@@ -13293,11 +12895,7 @@ class PubStatus implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, isListingPackageDirs.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => isListingPackageDirs.hashCode;
 }
 
 /// RefactoringFeedback
@@ -13333,10 +12931,7 @@ class RefactoringFeedback implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => 0;
 }
 
 /// RefactoringOptions
@@ -13371,10 +12966,7 @@ class RefactoringOptions implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => 0;
 }
 
 /// rename feedback
@@ -13465,14 +13057,12 @@ class RenameFeedback extends RefactoringFeedback {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, elementKindName.hashCode);
-    hash = JenkinsSmiHash.combine(hash, oldName.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+        elementKindName.hashCode,
+        oldName.hashCode,
+      );
 }
 
 /// rename options
@@ -13530,11 +13120,7 @@ class RenameOptions extends RefactoringOptions {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, newName.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => newName.hashCode;
 }
 
 /// RequestError
@@ -13614,13 +13200,11 @@ class RequestError implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, code.hashCode);
-    hash = JenkinsSmiHash.combine(hash, message.hashCode);
-    hash = JenkinsSmiHash.combine(hash, stackTrace.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        code.hashCode,
+        message.hashCode,
+        stackTrace.hashCode,
+      );
 }
 
 /// RequestErrorCode
@@ -14048,13 +13632,11 @@ class RuntimeCompletionExpression implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, type.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+        type.hashCode,
+      );
 }
 
 /// RuntimeCompletionExpressionType
@@ -14234,17 +13816,15 @@ class RuntimeCompletionExpressionType implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, libraryPath.hashCode);
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, typeArguments.hashCode);
-    hash = JenkinsSmiHash.combine(hash, returnType.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameterTypes.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameterNames.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        libraryPath.hashCode,
+        kind.hashCode,
+        name.hashCode,
+        typeArguments.hashCode,
+        returnType.hashCode,
+        parameterTypes.hashCode,
+        parameterNames.hashCode,
+      );
 }
 
 /// RuntimeCompletionExpressionTypeKind
@@ -14368,12 +13948,10 @@ class RuntimeCompletionVariable implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, type.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        name.hashCode,
+        type.hashCode,
+      );
 }
 
 /// search.findElementReferences params
@@ -14463,13 +14041,11 @@ class SearchFindElementReferencesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, includePotential.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+        includePotential.hashCode,
+      );
 }
 
 /// search.findElementReferences result
@@ -14553,12 +14129,10 @@ class SearchFindElementReferencesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    hash = JenkinsSmiHash.combine(hash, element.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        id.hashCode,
+        element.hashCode,
+      );
 }
 
 /// search.findMemberDeclarations params
@@ -14620,11 +14194,7 @@ class SearchFindMemberDeclarationsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => name.hashCode;
 }
 
 /// search.findMemberDeclarations result
@@ -14688,11 +14258,7 @@ class SearchFindMemberDeclarationsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => id.hashCode;
 }
 
 /// search.findMemberReferences params
@@ -14754,11 +14320,7 @@ class SearchFindMemberReferencesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => name.hashCode;
 }
 
 /// search.findMemberReferences result
@@ -14822,11 +14384,7 @@ class SearchFindMemberReferencesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => id.hashCode;
 }
 
 /// search.findTopLevelDeclarations params
@@ -14890,11 +14448,7 @@ class SearchFindTopLevelDeclarationsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, pattern.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => pattern.hashCode;
 }
 
 /// search.findTopLevelDeclarations result
@@ -14958,11 +14512,7 @@ class SearchFindTopLevelDeclarationsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => id.hashCode;
 }
 
 /// search.getElementDeclarations params
@@ -15058,13 +14608,11 @@ class SearchGetElementDeclarationsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, pattern.hashCode);
-    hash = JenkinsSmiHash.combine(hash, maxResults.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        pattern.hashCode,
+        maxResults.hashCode,
+      );
 }
 
 /// search.getElementDeclarations result
@@ -15147,12 +14695,10 @@ class SearchGetElementDeclarationsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, declarations.hashCode);
-    hash = JenkinsSmiHash.combine(hash, files.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        declarations.hashCode,
+        files.hashCode,
+      );
 }
 
 /// search.getTypeHierarchy params
@@ -15242,13 +14788,11 @@ class SearchGetTypeHierarchyParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, superOnly.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+        superOnly.hashCode,
+      );
 }
 
 /// search.getTypeHierarchy result
@@ -15328,11 +14872,7 @@ class SearchGetTypeHierarchyResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, hierarchyItems.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => hierarchyItems.hashCode;
 }
 
 /// SearchResult
@@ -15431,14 +14971,12 @@ class SearchResult implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, location.hashCode);
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, isPotential.hashCode);
-    hash = JenkinsSmiHash.combine(hash, path.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        location.hashCode,
+        kind.hashCode,
+        isPotential.hashCode,
+        path.hashCode,
+      );
 }
 
 /// SearchResultKind
@@ -15619,13 +15157,11 @@ class SearchResultsParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    hash = JenkinsSmiHash.combine(hash, results.hashCode);
-    hash = JenkinsSmiHash.combine(hash, isLast.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        id.hashCode,
+        results.hashCode,
+        isLast.hashCode,
+      );
 }
 
 /// server.connected params
@@ -15697,12 +15233,10 @@ class ServerConnectedParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, version.hashCode);
-    hash = JenkinsSmiHash.combine(hash, pid.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        version.hashCode,
+        pid.hashCode,
+      );
 }
 
 /// server.error params
@@ -15791,13 +15325,11 @@ class ServerErrorParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, isFatal.hashCode);
-    hash = JenkinsSmiHash.combine(hash, message.hashCode);
-    hash = JenkinsSmiHash.combine(hash, stackTrace.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        isFatal.hashCode,
+        message.hashCode,
+        stackTrace.hashCode,
+      );
 }
 
 /// server.getVersion params
@@ -15821,9 +15353,7 @@ class ServerGetVersionParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    return 55877452;
-  }
+  int get hashCode => 55877452;
 }
 
 /// server.getVersion result
@@ -15887,11 +15417,7 @@ class ServerGetVersionResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, version.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => version.hashCode;
 }
 
 /// ServerLogEntry
@@ -15968,13 +15494,11 @@ class ServerLogEntry implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, time.hashCode);
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, data.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        time.hashCode,
+        kind.hashCode,
+        data.hashCode,
+      );
 }
 
 /// ServerLogEntryKind
@@ -16121,11 +15645,7 @@ class ServerLogParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, entry.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => entry.hashCode;
 }
 
 /// ServerService
@@ -16242,11 +15762,7 @@ class ServerSetSubscriptionsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, subscriptions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => subscriptions.hashCode;
 }
 
 /// server.setSubscriptions result
@@ -16270,9 +15786,7 @@ class ServerSetSubscriptionsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 748820900;
-  }
+  int get hashCode => 748820900;
 }
 
 /// server.shutdown params
@@ -16296,9 +15810,7 @@ class ServerShutdownParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    return 366630911;
-  }
+  int get hashCode => 366630911;
 }
 
 /// server.shutdown result
@@ -16322,9 +15834,7 @@ class ServerShutdownResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 193626532;
-  }
+  int get hashCode => 193626532;
 }
 
 /// server.status params
@@ -16403,12 +15913,10 @@ class ServerStatusParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, analysis.hashCode);
-    hash = JenkinsSmiHash.combine(hash, pub.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        analysis.hashCode,
+        pub.hashCode,
+      );
 }
 
 /// TypeHierarchyItem
@@ -16568,15 +16076,13 @@ class TypeHierarchyItem implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, classElement.hashCode);
-    hash = JenkinsSmiHash.combine(hash, displayName.hashCode);
-    hash = JenkinsSmiHash.combine(hash, memberElement.hashCode);
-    hash = JenkinsSmiHash.combine(hash, superclass.hashCode);
-    hash = JenkinsSmiHash.combine(hash, interfaces.hashCode);
-    hash = JenkinsSmiHash.combine(hash, mixins.hashCode);
-    hash = JenkinsSmiHash.combine(hash, subclasses.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        classElement.hashCode,
+        displayName.hashCode,
+        memberElement.hashCode,
+        superclass.hashCode,
+        interfaces.hashCode,
+        mixins.hashCode,
+        subclasses.hashCode,
+      );
 }
diff --git a/pkg/analysis_server/pubspec.yaml b/pkg/analysis_server/pubspec.yaml
index 0879e014fc2..bb60379b0f5 100644
--- a/pkg/analysis_server/pubspec.yaml
+++ b/pkg/analysis_server/pubspec.yaml
@@ -39,3 +39,11 @@ dev_dependencies:
   matcher: any
   pedantic: ^1.9.0
   test_reflective_loader: any
+
+dependency_overrides:
+  _fe_analyzer_shared:
+    path: ../_fe_analyzer_shared
+  analyzer:
+    path: ../analyzer
+  meta:
+    path: ../meta
diff --git a/pkg/analysis_server/tool/spec/codegen_dart_protocol.dart b/pkg/analysis_server/tool/spec/codegen_dart_protocol.dart
index c17e46f2891..c3c4f3c3c89 100644
--- a/pkg/analysis_server/tool/spec/codegen_dart_protocol.dart
+++ b/pkg/analysis_server/tool/spec/codegen_dart_protocol.dart
@@ -384,8 +384,6 @@ class CodegenProtocolVisitor extends DartCodegenVisitor with CodeGenerator {
     writeln("import 'dart:convert' hide JsonDecoder;");
     writeln();
     if (isServer) {
-      writeln(
-          "import 'package:analyzer/src/generated/utilities_general.dart';");
       writeln("import 'package:$packageName/protocol/protocol.dart';");
       writeln(
           "import 'package:$packageName/src/protocol/protocol_internal.dart';");
@@ -400,7 +398,6 @@ class CodegenProtocolVisitor extends DartCodegenVisitor with CodeGenerator {
           "import 'package:$packageName/src/protocol/protocol_common.dart';");
       writeln(
           "import 'package:$packageName/src/protocol/protocol_internal.dart';");
-      writeln("import 'package:$packageName/src/protocol/protocol_util.dart';");
     }
   }
 
@@ -641,25 +638,33 @@ class CodegenProtocolVisitor extends DartCodegenVisitor with CodeGenerator {
   /// Emit the hashCode getter for an object class.
   void emitObjectHashCode(TypeObject? type, String className) {
     writeln('@override');
-    writeln('int get hashCode {');
+    writeln('int get hashCode => ');
     indent(() {
       if (type == null) {
-        writeln('return ${className.hashCode};');
+        writeln(' ${className.hashCode}');
       } else {
-        writeln('var hash = 0;');
-        for (var field in type.fields) {
-          String valueToCombine;
+        final items = type.fields.map((field) {
           if (field.value != null) {
-            valueToCombine = field.value.hashCode.toString();
+            return field.value.hashCode.toString();
           } else {
-            valueToCombine = '${field.name}.hashCode';
+            return '${field.name}.hashCode';
           }
-          writeln('hash = JenkinsSmiHash.combine(hash, $valueToCombine);');
+        }).toList();
+
+        if (items.isEmpty) {
+          writeln('0');
+        } else if (items.length == 1) {
+          writeln(items.single);
+        } else {
+          writeln('Object.hash(');
+          for (var field in items) {
+            writeln('$field,');
+          }
+          writeln(')');
         }
-        writeln('return JenkinsSmiHash.finish(hash);');
       }
+      writeln(';');
     });
-    writeln('}');
   }
 
   /// If the class named [className] requires special constructors, emit them
diff --git a/pkg/analysis_server_client/lib/src/protocol/protocol_common.dart b/pkg/analysis_server_client/lib/src/protocol/protocol_common.dart
index 0675a7a5084..96c6d1ba370 100644
--- a/pkg/analysis_server_client/lib/src/protocol/protocol_common.dart
+++ b/pkg/analysis_server_client/lib/src/protocol/protocol_common.dart
@@ -8,7 +8,6 @@
 
 import 'dart:convert' hide JsonDecoder;
 
-import 'package:analysis_server_client/src/protocol/protocol_util.dart';
 import 'package:analysis_server_client/src/protocol/protocol_base.dart';
 import 'package:analysis_server_client/src/protocol/protocol_internal.dart';
 
@@ -66,12 +65,10 @@ class AddContentOverlay implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, 704418402);
-    hash = JenkinsSmiHash.combine(hash, content.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        704418402,
+        content.hashCode,
+      );
 }
 
 /// AnalysisError
@@ -252,19 +249,17 @@ class AnalysisError implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, severity.hashCode);
-    hash = JenkinsSmiHash.combine(hash, type.hashCode);
-    hash = JenkinsSmiHash.combine(hash, location.hashCode);
-    hash = JenkinsSmiHash.combine(hash, message.hashCode);
-    hash = JenkinsSmiHash.combine(hash, correction.hashCode);
-    hash = JenkinsSmiHash.combine(hash, code.hashCode);
-    hash = JenkinsSmiHash.combine(hash, url.hashCode);
-    hash = JenkinsSmiHash.combine(hash, contextMessages.hashCode);
-    hash = JenkinsSmiHash.combine(hash, hasFix.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        severity.hashCode,
+        type.hashCode,
+        location.hashCode,
+        message.hashCode,
+        correction.hashCode,
+        code.hashCode,
+        url.hashCode,
+        contextMessages.hashCode,
+        hasFix.hashCode,
+      );
 }
 
 /// AnalysisErrorSeverity
@@ -477,12 +472,10 @@ class ChangeContentOverlay implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, 873118866);
-    hash = JenkinsSmiHash.combine(hash, edits.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        873118866,
+        edits.hashCode,
+      );
 }
 
 /// CompletionSuggestion
@@ -918,33 +911,31 @@ class CompletionSuggestion implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, relevance.hashCode);
-    hash = JenkinsSmiHash.combine(hash, completion.hashCode);
-    hash = JenkinsSmiHash.combine(hash, displayText.hashCode);
-    hash = JenkinsSmiHash.combine(hash, replacementOffset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, replacementLength.hashCode);
-    hash = JenkinsSmiHash.combine(hash, selectionOffset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, selectionLength.hashCode);
-    hash = JenkinsSmiHash.combine(hash, isDeprecated.hashCode);
-    hash = JenkinsSmiHash.combine(hash, isPotential.hashCode);
-    hash = JenkinsSmiHash.combine(hash, docSummary.hashCode);
-    hash = JenkinsSmiHash.combine(hash, docComplete.hashCode);
-    hash = JenkinsSmiHash.combine(hash, declaringType.hashCode);
-    hash = JenkinsSmiHash.combine(hash, defaultArgumentListString.hashCode);
-    hash = JenkinsSmiHash.combine(hash, defaultArgumentListTextRanges.hashCode);
-    hash = JenkinsSmiHash.combine(hash, element.hashCode);
-    hash = JenkinsSmiHash.combine(hash, returnType.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameterNames.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameterTypes.hashCode);
-    hash = JenkinsSmiHash.combine(hash, requiredParameterCount.hashCode);
-    hash = JenkinsSmiHash.combine(hash, hasNamedParameters.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameterName.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameterType.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hashAll([
+        kind.hashCode,
+        relevance.hashCode,
+        completion.hashCode,
+        displayText.hashCode,
+        replacementOffset.hashCode,
+        replacementLength.hashCode,
+        selectionOffset.hashCode,
+        selectionLength.hashCode,
+        isDeprecated.hashCode,
+        isPotential.hashCode,
+        docSummary.hashCode,
+        docComplete.hashCode,
+        declaringType.hashCode,
+        defaultArgumentListString.hashCode,
+        defaultArgumentListTextRanges.hashCode,
+        element.hashCode,
+        returnType.hashCode,
+        parameterNames.hashCode,
+        parameterTypes.hashCode,
+        requiredParameterCount.hashCode,
+        hasNamedParameters.hashCode,
+        parameterName.hashCode,
+        parameterType.hashCode,
+      ]);
 }
 
 /// CompletionSuggestionKind
@@ -1139,12 +1130,10 @@ class DiagnosticMessage implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, message.hashCode);
-    hash = JenkinsSmiHash.combine(hash, location.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        message.hashCode,
+        location.hashCode,
+      );
 }
 
 /// Element
@@ -1347,18 +1336,16 @@ class Element implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, location.hashCode);
-    hash = JenkinsSmiHash.combine(hash, flags.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameters.hashCode);
-    hash = JenkinsSmiHash.combine(hash, returnType.hashCode);
-    hash = JenkinsSmiHash.combine(hash, typeParameters.hashCode);
-    hash = JenkinsSmiHash.combine(hash, aliasedType.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        kind.hashCode,
+        name.hashCode,
+        location.hashCode,
+        flags.hashCode,
+        parameters.hashCode,
+        returnType.hashCode,
+        typeParameters.hashCode,
+        aliasedType.hashCode,
+      );
 }
 
 /// ElementKind
@@ -1753,13 +1740,11 @@ class FoldingRegion implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        kind.hashCode,
+        offset.hashCode,
+        length.hashCode,
+      );
 }
 
 /// HighlightRegion
@@ -1835,13 +1820,11 @@ class HighlightRegion implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, type.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        type.hashCode,
+        offset.hashCode,
+        length.hashCode,
+      );
 }
 
 /// HighlightRegionType
@@ -2545,15 +2528,13 @@ class KytheEntry implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, source.hashCode);
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, target.hashCode);
-    hash = JenkinsSmiHash.combine(hash, fact.hashCode);
-    hash = JenkinsSmiHash.combine(hash, value.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        source.hashCode,
+        kind.hashCode,
+        target.hashCode,
+        fact.hashCode,
+        value.hashCode,
+      );
 }
 
 /// KytheVName
@@ -2659,15 +2640,13 @@ class KytheVName implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, signature.hashCode);
-    hash = JenkinsSmiHash.combine(hash, corpus.hashCode);
-    hash = JenkinsSmiHash.combine(hash, root.hashCode);
-    hash = JenkinsSmiHash.combine(hash, path.hashCode);
-    hash = JenkinsSmiHash.combine(hash, language.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        signature.hashCode,
+        corpus.hashCode,
+        root.hashCode,
+        path.hashCode,
+        language.hashCode,
+      );
 }
 
 /// LinkedEditGroup
@@ -2770,13 +2749,11 @@ class LinkedEditGroup implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, positions.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, suggestions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        positions.hashCode,
+        length.hashCode,
+        suggestions.hashCode,
+      );
 }
 
 /// LinkedEditSuggestion
@@ -2839,12 +2816,10 @@ class LinkedEditSuggestion implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, value.hashCode);
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        value.hashCode,
+        kind.hashCode,
+      );
 }
 
 /// LinkedEditSuggestionKind
@@ -3043,17 +3018,15 @@ class Location implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, startLine.hashCode);
-    hash = JenkinsSmiHash.combine(hash, startColumn.hashCode);
-    hash = JenkinsSmiHash.combine(hash, endLine.hashCode);
-    hash = JenkinsSmiHash.combine(hash, endColumn.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+        length.hashCode,
+        startLine.hashCode,
+        startColumn.hashCode,
+        endLine.hashCode,
+        endColumn.hashCode,
+      );
 }
 
 /// NavigationRegion
@@ -3131,13 +3104,11 @@ class NavigationRegion implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, targets.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+        targets.hashCode,
+      );
 }
 
 /// NavigationTarget
@@ -3287,18 +3258,16 @@ class NavigationTarget implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, fileIndex.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, startLine.hashCode);
-    hash = JenkinsSmiHash.combine(hash, startColumn.hashCode);
-    hash = JenkinsSmiHash.combine(hash, codeOffset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, codeLength.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        kind.hashCode,
+        fileIndex.hashCode,
+        offset.hashCode,
+        length.hashCode,
+        startLine.hashCode,
+        startColumn.hashCode,
+        codeOffset.hashCode,
+        codeLength.hashCode,
+      );
 }
 
 /// Occurrences
@@ -3375,13 +3344,11 @@ class Occurrences implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, element.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offsets.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        element.hashCode,
+        offsets.hashCode,
+        length.hashCode,
+      );
 }
 
 /// Outline
@@ -3509,16 +3476,14 @@ class Outline implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, element.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, codeOffset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, codeLength.hashCode);
-    hash = JenkinsSmiHash.combine(hash, children.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        element.hashCode,
+        offset.hashCode,
+        length.hashCode,
+        codeOffset.hashCode,
+        codeLength.hashCode,
+        children.hashCode,
+      );
 }
 
 /// ParameterInfo
@@ -3609,14 +3574,12 @@ class ParameterInfo implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, type.hashCode);
-    hash = JenkinsSmiHash.combine(hash, defaultValue.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        kind.hashCode,
+        name.hashCode,
+        type.hashCode,
+        defaultValue.hashCode,
+      );
 }
 
 /// ParameterKind
@@ -3748,12 +3711,10 @@ class Position implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// RefactoringKind
@@ -3963,15 +3924,13 @@ class RefactoringMethodParameter implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, type.hashCode);
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameters.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        id.hashCode,
+        kind.hashCode,
+        type.hashCode,
+        name.hashCode,
+        parameters.hashCode,
+      );
 }
 
 /// RefactoringMethodParameterKind
@@ -4111,13 +4070,11 @@ class RefactoringProblem implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, severity.hashCode);
-    hash = JenkinsSmiHash.combine(hash, message.hashCode);
-    hash = JenkinsSmiHash.combine(hash, location.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        severity.hashCode,
+        message.hashCode,
+        location.hashCode,
+      );
 }
 
 /// RefactoringProblemSeverity
@@ -4248,11 +4205,7 @@ class RemoveContentOverlay implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, 114870849);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => 114870849;
 }
 
 /// SourceChange
@@ -4397,15 +4350,13 @@ class SourceChange implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, message.hashCode);
-    hash = JenkinsSmiHash.combine(hash, edits.hashCode);
-    hash = JenkinsSmiHash.combine(hash, linkedEditGroups.hashCode);
-    hash = JenkinsSmiHash.combine(hash, selection.hashCode);
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        message.hashCode,
+        edits.hashCode,
+        linkedEditGroups.hashCode,
+        selection.hashCode,
+        id.hashCode,
+      );
 }
 
 /// SourceEdit
@@ -4512,14 +4463,12 @@ class SourceEdit implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, replacement.hashCode);
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+        replacement.hashCode,
+        id.hashCode,
+      );
 }
 
 /// SourceFileEdit
@@ -4610,11 +4559,9 @@ class SourceFileEdit implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, fileStamp.hashCode);
-    hash = JenkinsSmiHash.combine(hash, edits.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        fileStamp.hashCode,
+        edits.hashCode,
+      );
 }
diff --git a/pkg/analysis_server_client/lib/src/protocol/protocol_generated.dart b/pkg/analysis_server_client/lib/src/protocol/protocol_generated.dart
index 470f8305c6a..ee185f6668b 100644
--- a/pkg/analysis_server_client/lib/src/protocol/protocol_generated.dart
+++ b/pkg/analysis_server_client/lib/src/protocol/protocol_generated.dart
@@ -11,7 +11,6 @@ import 'dart:convert' hide JsonDecoder;
 import 'package:analysis_server_client/src/protocol/protocol_base.dart';
 import 'package:analysis_server_client/src/protocol/protocol_common.dart';
 import 'package:analysis_server_client/src/protocol/protocol_internal.dart';
-import 'package:analysis_server_client/src/protocol/protocol_util.dart';
 
 /// analysis.analyzedFiles params
 ///
@@ -74,11 +73,7 @@ class AnalysisAnalyzedFilesParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, directories.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => directories.hashCode;
 }
 
 /// analysis.closingLabels params
@@ -164,12 +159,10 @@ class AnalysisClosingLabelsParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, labels.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        labels.hashCode,
+      );
 }
 
 /// AnalysisErrorFixes
@@ -240,12 +233,10 @@ class AnalysisErrorFixes implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, error.hashCode);
-    hash = JenkinsSmiHash.combine(hash, fixes.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        error.hashCode,
+        fixes.hashCode,
+      );
 }
 
 /// analysis.errors params
@@ -323,12 +314,10 @@ class AnalysisErrorsParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, errors.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        errors.hashCode,
+      );
 }
 
 /// analysis.flushResults params
@@ -391,11 +380,7 @@ class AnalysisFlushResultsParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, files.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => files.hashCode;
 }
 
 /// analysis.folding params
@@ -473,12 +458,10 @@ class AnalysisFoldingParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, regions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        regions.hashCode,
+      );
 }
 
 /// analysis.getErrors params
@@ -539,11 +522,7 @@ class AnalysisGetErrorsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => file.hashCode;
 }
 
 /// analysis.getErrors result
@@ -612,11 +591,7 @@ class AnalysisGetErrorsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, errors.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => errors.hashCode;
 }
 
 /// analysis.getHover params
@@ -688,12 +663,10 @@ class AnalysisGetHoverParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// analysis.getHover result
@@ -766,11 +739,7 @@ class AnalysisGetHoverResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, hovers.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => hovers.hashCode;
 }
 
 /// analysis.getImportedElements params
@@ -856,13 +825,11 @@ class AnalysisGetImportedElementsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+        length.hashCode,
+      );
 }
 
 /// analysis.getImportedElements result
@@ -933,11 +900,7 @@ class AnalysisGetImportedElementsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, elements.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => elements.hashCode;
 }
 
 /// analysis.getLibraryDependencies params
@@ -961,9 +924,7 @@ class AnalysisGetLibraryDependenciesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    return 246577680;
-  }
+  int get hashCode => 246577680;
 }
 
 /// analysis.getLibraryDependencies result
@@ -1057,12 +1018,10 @@ class AnalysisGetLibraryDependenciesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, libraries.hashCode);
-    hash = JenkinsSmiHash.combine(hash, packageMap.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        libraries.hashCode,
+        packageMap.hashCode,
+      );
 }
 
 /// analysis.getNavigation params
@@ -1150,13 +1109,11 @@ class AnalysisGetNavigationParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+        length.hashCode,
+      );
 }
 
 /// analysis.getNavigation result
@@ -1259,13 +1216,11 @@ class AnalysisGetNavigationResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, files.hashCode);
-    hash = JenkinsSmiHash.combine(hash, targets.hashCode);
-    hash = JenkinsSmiHash.combine(hash, regions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        files.hashCode,
+        targets.hashCode,
+        regions.hashCode,
+      );
 }
 
 /// analysis.getReachableSources params
@@ -1327,11 +1282,7 @@ class AnalysisGetReachableSourcesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => file.hashCode;
 }
 
 /// analysis.getReachableSources result
@@ -1407,11 +1358,7 @@ class AnalysisGetReachableSourcesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, sources.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => sources.hashCode;
 }
 
 /// analysis.getSignature params
@@ -1484,12 +1431,10 @@ class AnalysisGetSignatureParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// analysis.getSignature result
@@ -1590,13 +1535,11 @@ class AnalysisGetSignatureResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameters.hashCode);
-    hash = JenkinsSmiHash.combine(hash, dartdoc.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        name.hashCode,
+        parameters.hashCode,
+        dartdoc.hashCode,
+      );
 }
 
 /// analysis.highlights params
@@ -1678,12 +1621,10 @@ class AnalysisHighlightsParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, regions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        regions.hashCode,
+      );
 }
 
 /// analysis.implemented params
@@ -1780,13 +1721,11 @@ class AnalysisImplementedParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, classes.hashCode);
-    hash = JenkinsSmiHash.combine(hash, members.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        classes.hashCode,
+        members.hashCode,
+      );
 }
 
 /// analysis.invalidate params
@@ -1884,14 +1823,12 @@ class AnalysisInvalidateParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, delta.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+        length.hashCode,
+        delta.hashCode,
+      );
 }
 
 /// analysis.navigation params
@@ -2008,14 +1945,12 @@ class AnalysisNavigationParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, regions.hashCode);
-    hash = JenkinsSmiHash.combine(hash, targets.hashCode);
-    hash = JenkinsSmiHash.combine(hash, files.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        regions.hashCode,
+        targets.hashCode,
+        files.hashCode,
+      );
 }
 
 /// analysis.occurrences params
@@ -2094,12 +2029,10 @@ class AnalysisOccurrencesParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, occurrences.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        occurrences.hashCode,
+      );
 }
 
 /// AnalysisOptions
@@ -2282,18 +2215,16 @@ class AnalysisOptions implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, enableAsync.hashCode);
-    hash = JenkinsSmiHash.combine(hash, enableDeferredLoading.hashCode);
-    hash = JenkinsSmiHash.combine(hash, enableEnums.hashCode);
-    hash = JenkinsSmiHash.combine(hash, enableNullAwareOperators.hashCode);
-    hash = JenkinsSmiHash.combine(hash, enableSuperMixins.hashCode);
-    hash = JenkinsSmiHash.combine(hash, generateDart2jsHints.hashCode);
-    hash = JenkinsSmiHash.combine(hash, generateHints.hashCode);
-    hash = JenkinsSmiHash.combine(hash, generateLints.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        enableAsync.hashCode,
+        enableDeferredLoading.hashCode,
+        enableEnums.hashCode,
+        enableNullAwareOperators.hashCode,
+        enableSuperMixins.hashCode,
+        generateDart2jsHints.hashCode,
+        generateHints.hashCode,
+        generateLints.hashCode,
+      );
 }
 
 /// analysis.outline params
@@ -2397,14 +2328,12 @@ class AnalysisOutlineParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, libraryName.hashCode);
-    hash = JenkinsSmiHash.combine(hash, outline.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        kind.hashCode,
+        libraryName.hashCode,
+        outline.hashCode,
+      );
 }
 
 /// analysis.overrides params
@@ -2482,12 +2411,10 @@ class AnalysisOverridesParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, overrides.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        overrides.hashCode,
+      );
 }
 
 /// analysis.reanalyze params
@@ -2511,9 +2438,7 @@ class AnalysisReanalyzeParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    return 613039876;
-  }
+  int get hashCode => 613039876;
 }
 
 /// analysis.reanalyze result
@@ -2537,9 +2462,7 @@ class AnalysisReanalyzeResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 846803925;
-  }
+  int get hashCode => 846803925;
 }
 
 /// AnalysisService
@@ -2743,13 +2666,11 @@ class AnalysisSetAnalysisRootsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, included.hashCode);
-    hash = JenkinsSmiHash.combine(hash, excluded.hashCode);
-    hash = JenkinsSmiHash.combine(hash, packageRoots.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        included.hashCode,
+        excluded.hashCode,
+        packageRoots.hashCode,
+      );
 }
 
 /// analysis.setAnalysisRoots result
@@ -2773,9 +2694,7 @@ class AnalysisSetAnalysisRootsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 866004753;
-  }
+  int get hashCode => 866004753;
 }
 
 /// analysis.setGeneralSubscriptions params
@@ -2844,11 +2763,7 @@ class AnalysisSetGeneralSubscriptionsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, subscriptions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => subscriptions.hashCode;
 }
 
 /// analysis.setGeneralSubscriptions result
@@ -2872,9 +2787,7 @@ class AnalysisSetGeneralSubscriptionsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 386759562;
-  }
+  int get hashCode => 386759562;
 }
 
 /// analysis.setPriorityFiles params
@@ -2937,11 +2850,7 @@ class AnalysisSetPriorityFilesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, files.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => files.hashCode;
 }
 
 /// analysis.setPriorityFiles result
@@ -2965,9 +2874,7 @@ class AnalysisSetPriorityFilesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 330050055;
-  }
+  int get hashCode => 330050055;
 }
 
 /// analysis.setSubscriptions params
@@ -3040,11 +2947,7 @@ class AnalysisSetSubscriptionsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, subscriptions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => subscriptions.hashCode;
 }
 
 /// analysis.setSubscriptions result
@@ -3068,9 +2971,7 @@ class AnalysisSetSubscriptionsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 218088493;
-  }
+  int get hashCode => 218088493;
 }
 
 /// AnalysisStatus
@@ -3137,12 +3038,10 @@ class AnalysisStatus implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, isAnalyzing.hashCode);
-    hash = JenkinsSmiHash.combine(hash, analysisTarget.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        isAnalyzing.hashCode,
+        analysisTarget.hashCode,
+      );
 }
 
 /// analysis.updateContent params
@@ -3216,11 +3115,7 @@ class AnalysisUpdateContentParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, files.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => files.hashCode;
 }
 
 /// analysis.updateContent result
@@ -3273,10 +3168,7 @@ class AnalysisUpdateContentResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => 0;
 }
 
 /// analysis.updateOptions params
@@ -3339,11 +3231,7 @@ class AnalysisUpdateOptionsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, options.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => options.hashCode;
 }
 
 /// analysis.updateOptions result
@@ -3367,9 +3255,7 @@ class AnalysisUpdateOptionsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 179689467;
-  }
+  int get hashCode => 179689467;
 }
 
 /// analytics.enable params
@@ -3430,11 +3316,7 @@ class AnalyticsEnableParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, value.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => value.hashCode;
 }
 
 /// analytics.enable result
@@ -3458,9 +3340,7 @@ class AnalyticsEnableResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 237990792;
-  }
+  int get hashCode => 237990792;
 }
 
 /// analytics.isEnabled params
@@ -3484,9 +3364,7 @@ class AnalyticsIsEnabledParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    return 57215544;
-  }
+  int get hashCode => 57215544;
 }
 
 /// analytics.isEnabled result
@@ -3550,11 +3428,7 @@ class AnalyticsIsEnabledResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, enabled.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => enabled.hashCode;
 }
 
 /// analytics.sendEvent params
@@ -3615,11 +3489,7 @@ class AnalyticsSendEventParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, action.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => action.hashCode;
 }
 
 /// analytics.sendEvent result
@@ -3643,9 +3513,7 @@ class AnalyticsSendEventResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 227063188;
-  }
+  int get hashCode => 227063188;
 }
 
 /// analytics.sendTiming params
@@ -3717,12 +3585,10 @@ class AnalyticsSendTimingParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, event.hashCode);
-    hash = JenkinsSmiHash.combine(hash, millis.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        event.hashCode,
+        millis.hashCode,
+      );
 }
 
 /// analytics.sendTiming result
@@ -3746,9 +3612,7 @@ class AnalyticsSendTimingResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 875010924;
-  }
+  int get hashCode => 875010924;
 }
 
 /// AvailableSuggestion
@@ -3941,19 +3805,17 @@ class AvailableSuggestion implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, label.hashCode);
-    hash = JenkinsSmiHash.combine(hash, declaringLibraryUri.hashCode);
-    hash = JenkinsSmiHash.combine(hash, element.hashCode);
-    hash = JenkinsSmiHash.combine(hash, defaultArgumentListString.hashCode);
-    hash = JenkinsSmiHash.combine(hash, defaultArgumentListTextRanges.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameterNames.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameterTypes.hashCode);
-    hash = JenkinsSmiHash.combine(hash, relevanceTags.hashCode);
-    hash = JenkinsSmiHash.combine(hash, requiredParameterCount.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        label.hashCode,
+        declaringLibraryUri.hashCode,
+        element.hashCode,
+        defaultArgumentListString.hashCode,
+        defaultArgumentListTextRanges.hashCode,
+        parameterNames.hashCode,
+        parameterTypes.hashCode,
+        relevanceTags.hashCode,
+        requiredParameterCount.hashCode,
+      );
 }
 
 /// AvailableSuggestionSet
@@ -4033,13 +3895,11 @@ class AvailableSuggestionSet implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    hash = JenkinsSmiHash.combine(hash, uri.hashCode);
-    hash = JenkinsSmiHash.combine(hash, items.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        id.hashCode,
+        uri.hashCode,
+        items.hashCode,
+      );
 }
 
 /// BulkFix
@@ -4108,12 +3968,10 @@ class BulkFix implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, path.hashCode);
-    hash = JenkinsSmiHash.combine(hash, fixes.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        path.hashCode,
+        fixes.hashCode,
+      );
 }
 
 /// BulkFixDetail
@@ -4177,12 +4035,10 @@ class BulkFixDetail implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, code.hashCode);
-    hash = JenkinsSmiHash.combine(hash, occurrences.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        code.hashCode,
+        occurrences.hashCode,
+      );
 }
 
 /// ClosingLabel
@@ -4258,13 +4114,11 @@ class ClosingLabel implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, label.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+        label.hashCode,
+      );
 }
 
 /// completion.availableSuggestions params
@@ -4355,12 +4209,10 @@ class CompletionAvailableSuggestionsParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, changedLibraries.hashCode);
-    hash = JenkinsSmiHash.combine(hash, removedLibraries.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        changedLibraries.hashCode,
+        removedLibraries.hashCode,
+      );
 }
 
 /// completion.existingImports params
@@ -4434,12 +4286,10 @@ class CompletionExistingImportsParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, imports.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        imports.hashCode,
+      );
 }
 
 /// completion.getSuggestionDetails params
@@ -4540,14 +4390,12 @@ class CompletionGetSuggestionDetailsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    hash = JenkinsSmiHash.combine(hash, label.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        id.hashCode,
+        label.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// completion.getSuggestionDetails result
@@ -4627,12 +4475,10 @@ class CompletionGetSuggestionDetailsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, completion.hashCode);
-    hash = JenkinsSmiHash.combine(hash, change.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        completion.hashCode,
+        change.hashCode,
+      );
 }
 
 /// completion.getSuggestions params
@@ -4705,12 +4551,10 @@ class CompletionGetSuggestionsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// completion.getSuggestions result
@@ -4774,11 +4618,7 @@ class CompletionGetSuggestionsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => id.hashCode;
 }
 
 /// completion.registerLibraryPaths params
@@ -4849,11 +4689,7 @@ class CompletionRegisterLibraryPathsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, paths.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => paths.hashCode;
 }
 
 /// completion.registerLibraryPaths result
@@ -4877,9 +4713,7 @@ class CompletionRegisterLibraryPathsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 104675661;
-  }
+  int get hashCode => 104675661;
 }
 
 /// completion.results params
@@ -5111,20 +4945,17 @@ class CompletionResultsParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    hash = JenkinsSmiHash.combine(hash, replacementOffset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, replacementLength.hashCode);
-    hash = JenkinsSmiHash.combine(hash, results.hashCode);
-    hash = JenkinsSmiHash.combine(hash, isLast.hashCode);
-    hash = JenkinsSmiHash.combine(hash, libraryFile.hashCode);
-    hash = JenkinsSmiHash.combine(hash, includedSuggestionSets.hashCode);
-    hash = JenkinsSmiHash.combine(hash, includedElementKinds.hashCode);
-    hash =
-        JenkinsSmiHash.combine(hash, includedSuggestionRelevanceTags.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        id.hashCode,
+        replacementOffset.hashCode,
+        replacementLength.hashCode,
+        results.hashCode,
+        isLast.hashCode,
+        libraryFile.hashCode,
+        includedSuggestionSets.hashCode,
+        includedElementKinds.hashCode,
+        includedSuggestionRelevanceTags.hashCode,
+      );
 }
 
 /// CompletionService
@@ -5246,11 +5077,7 @@ class CompletionSetSubscriptionsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, subscriptions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => subscriptions.hashCode;
 }
 
 /// completion.setSubscriptions result
@@ -5274,9 +5101,7 @@ class CompletionSetSubscriptionsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 2482770;
-  }
+  int get hashCode => 2482770;
 }
 
 /// ContextData
@@ -5384,15 +5209,13 @@ class ContextData implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, explicitFileCount.hashCode);
-    hash = JenkinsSmiHash.combine(hash, implicitFileCount.hashCode);
-    hash = JenkinsSmiHash.combine(hash, workItemQueueLength.hashCode);
-    hash = JenkinsSmiHash.combine(hash, cacheEntryExceptions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        name.hashCode,
+        explicitFileCount.hashCode,
+        implicitFileCount.hashCode,
+        workItemQueueLength.hashCode,
+        cacheEntryExceptions.hashCode,
+      );
 }
 
 /// convertGetterToMethod feedback
@@ -5409,9 +5232,7 @@ class ConvertGetterToMethodFeedback extends RefactoringFeedback
   }
 
   @override
-  int get hashCode {
-    return 616032599;
-  }
+  int get hashCode => 616032599;
 }
 
 /// convertGetterToMethod options
@@ -5428,9 +5249,7 @@ class ConvertGetterToMethodOptions extends RefactoringOptions
   }
 
   @override
-  int get hashCode {
-    return 488848400;
-  }
+  int get hashCode => 488848400;
 }
 
 /// convertMethodToGetter feedback
@@ -5447,9 +5266,7 @@ class ConvertMethodToGetterFeedback extends RefactoringFeedback
   }
 
   @override
-  int get hashCode {
-    return 165291526;
-  }
+  int get hashCode => 165291526;
 }
 
 /// convertMethodToGetter options
@@ -5466,9 +5283,7 @@ class ConvertMethodToGetterOptions extends RefactoringOptions
   }
 
   @override
-  int get hashCode {
-    return 27952290;
-  }
+  int get hashCode => 27952290;
 }
 
 /// diagnostic.getDiagnostics params
@@ -5492,9 +5307,7 @@ class DiagnosticGetDiagnosticsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    return 587526202;
-  }
+  int get hashCode => 587526202;
 }
 
 /// diagnostic.getDiagnostics result
@@ -5564,11 +5377,7 @@ class DiagnosticGetDiagnosticsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, contexts.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => contexts.hashCode;
 }
 
 /// diagnostic.getServerPort params
@@ -5592,9 +5401,7 @@ class DiagnosticGetServerPortParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    return 367508704;
-  }
+  int get hashCode => 367508704;
 }
 
 /// diagnostic.getServerPort result
@@ -5658,11 +5465,7 @@ class DiagnosticGetServerPortResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, port.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => port.hashCode;
 }
 
 /// edit.bulkFixes params
@@ -5751,12 +5554,10 @@ class EditBulkFixesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, included.hashCode);
-    hash = JenkinsSmiHash.combine(hash, inTestMode.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        included.hashCode,
+        inTestMode.hashCode,
+      );
 }
 
 /// edit.bulkFixes result
@@ -5841,12 +5642,10 @@ class EditBulkFixesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, edits.hashCode);
-    hash = JenkinsSmiHash.combine(hash, details.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        edits.hashCode,
+        details.hashCode,
+      );
 }
 
 /// edit.format params
@@ -5949,14 +5748,12 @@ class EditFormatParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, selectionOffset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, selectionLength.hashCode);
-    hash = JenkinsSmiHash.combine(hash, lineLength.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        selectionOffset.hashCode,
+        selectionLength.hashCode,
+        lineLength.hashCode,
+      );
 }
 
 /// edit.format result
@@ -6051,13 +5848,11 @@ class EditFormatResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, edits.hashCode);
-    hash = JenkinsSmiHash.combine(hash, selectionOffset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, selectionLength.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        edits.hashCode,
+        selectionOffset.hashCode,
+        selectionLength.hashCode,
+      );
 }
 
 /// edit.getAssists params
@@ -6142,13 +5937,11 @@ class EditGetAssistsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+        length.hashCode,
+      );
 }
 
 /// edit.getAssists result
@@ -6217,11 +6010,7 @@ class EditGetAssistsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, assists.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => assists.hashCode;
 }
 
 /// edit.getAvailableRefactorings params
@@ -6307,13 +6096,11 @@ class EditGetAvailableRefactoringsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+        length.hashCode,
+      );
 }
 
 /// edit.getAvailableRefactorings result
@@ -6383,11 +6170,7 @@ class EditGetAvailableRefactoringsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, kinds.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => kinds.hashCode;
 }
 
 /// edit.getFixes params
@@ -6459,12 +6242,10 @@ class EditGetFixesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// edit.getFixes result
@@ -6533,11 +6314,7 @@ class EditGetFixesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, fixes.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => fixes.hashCode;
 }
 
 /// edit.getPostfixCompletion params
@@ -6622,13 +6399,11 @@ class EditGetPostfixCompletionParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, key.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        key.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// edit.getPostfixCompletion result
@@ -6693,11 +6468,7 @@ class EditGetPostfixCompletionResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, change.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => change.hashCode;
 }
 
 /// edit.getRefactoring params
@@ -6832,16 +6603,14 @@ class EditGetRefactoringParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, validateOnly.hashCode);
-    hash = JenkinsSmiHash.combine(hash, options.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        kind.hashCode,
+        file.hashCode,
+        offset.hashCode,
+        length.hashCode,
+        validateOnly.hashCode,
+        options.hashCode,
+      );
 }
 
 /// edit.getRefactoring result
@@ -7014,16 +6783,14 @@ class EditGetRefactoringResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, initialProblems.hashCode);
-    hash = JenkinsSmiHash.combine(hash, optionsProblems.hashCode);
-    hash = JenkinsSmiHash.combine(hash, finalProblems.hashCode);
-    hash = JenkinsSmiHash.combine(hash, feedback.hashCode);
-    hash = JenkinsSmiHash.combine(hash, change.hashCode);
-    hash = JenkinsSmiHash.combine(hash, potentialEdits.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        initialProblems.hashCode,
+        optionsProblems.hashCode,
+        finalProblems.hashCode,
+        feedback.hashCode,
+        change.hashCode,
+        potentialEdits.hashCode,
+      );
 }
 
 /// edit.getStatementCompletion params
@@ -7096,12 +6863,10 @@ class EditGetStatementCompletionParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// edit.getStatementCompletion result
@@ -7179,12 +6944,10 @@ class EditGetStatementCompletionResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, change.hashCode);
-    hash = JenkinsSmiHash.combine(hash, whitespaceOnly.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        change.hashCode,
+        whitespaceOnly.hashCode,
+      );
 }
 
 /// edit.importElements params
@@ -7279,13 +7042,11 @@ class EditImportElementsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, elements.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        elements.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// edit.importElements result
@@ -7355,11 +7116,7 @@ class EditImportElementsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, edit.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => edit.hashCode;
 }
 
 /// edit.isPostfixCompletionApplicable params
@@ -7444,13 +7201,11 @@ class EditIsPostfixCompletionApplicableParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, key.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        key.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// edit.isPostfixCompletionApplicable result
@@ -7515,11 +7270,7 @@ class EditIsPostfixCompletionApplicableResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, value.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => value.hashCode;
 }
 
 /// edit.listPostfixCompletionTemplates params
@@ -7543,9 +7294,7 @@ class EditListPostfixCompletionTemplatesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    return 690713107;
-  }
+  int get hashCode => 690713107;
 }
 
 /// edit.listPostfixCompletionTemplates result
@@ -7618,11 +7367,7 @@ class EditListPostfixCompletionTemplatesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, templates.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => templates.hashCode;
 }
 
 /// edit.organizeDirectives params
@@ -7684,11 +7429,7 @@ class EditOrganizeDirectivesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => file.hashCode;
 }
 
 /// edit.organizeDirectives result
@@ -7754,11 +7495,7 @@ class EditOrganizeDirectivesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, edit.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => edit.hashCode;
 }
 
 /// edit.sortMembers params
@@ -7819,11 +7556,7 @@ class EditSortMembersParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => file.hashCode;
 }
 
 /// edit.sortMembers result
@@ -7888,11 +7621,7 @@ class EditSortMembersResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, edit.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => edit.hashCode;
 }
 
 /// ElementDeclaration
@@ -8084,21 +7813,19 @@ class ElementDeclaration implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, fileIndex.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, line.hashCode);
-    hash = JenkinsSmiHash.combine(hash, column.hashCode);
-    hash = JenkinsSmiHash.combine(hash, codeOffset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, codeLength.hashCode);
-    hash = JenkinsSmiHash.combine(hash, className.hashCode);
-    hash = JenkinsSmiHash.combine(hash, mixinName.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameters.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        name.hashCode,
+        kind.hashCode,
+        fileIndex.hashCode,
+        offset.hashCode,
+        line.hashCode,
+        column.hashCode,
+        codeOffset.hashCode,
+        codeLength.hashCode,
+        className.hashCode,
+        mixinName.hashCode,
+        parameters.hashCode,
+      );
 }
 
 /// ExecutableFile
@@ -8161,12 +7888,10 @@ class ExecutableFile implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        kind.hashCode,
+      );
 }
 
 /// ExecutableKind
@@ -8295,11 +8020,7 @@ class ExecutionCreateContextParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, contextRoot.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => contextRoot.hashCode;
 }
 
 /// execution.createContext result
@@ -8363,11 +8084,7 @@ class ExecutionCreateContextResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => id.hashCode;
 }
 
 /// execution.deleteContext params
@@ -8429,11 +8146,7 @@ class ExecutionDeleteContextParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => id.hashCode;
 }
 
 /// execution.deleteContext result
@@ -8457,9 +8170,7 @@ class ExecutionDeleteContextResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 479954425;
-  }
+  int get hashCode => 479954425;
 }
 
 /// execution.getSuggestions params
@@ -8623,16 +8334,14 @@ class ExecutionGetSuggestionsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, code.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, contextFile.hashCode);
-    hash = JenkinsSmiHash.combine(hash, contextOffset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, variables.hashCode);
-    hash = JenkinsSmiHash.combine(hash, expressions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        code.hashCode,
+        offset.hashCode,
+        contextFile.hashCode,
+        contextOffset.hashCode,
+        variables.hashCode,
+        expressions.hashCode,
+      );
 }
 
 /// execution.getSuggestions result
@@ -8739,12 +8448,10 @@ class ExecutionGetSuggestionsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, suggestions.hashCode);
-    hash = JenkinsSmiHash.combine(hash, expressions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        suggestions.hashCode,
+        expressions.hashCode,
+      );
 }
 
 /// execution.launchData params
@@ -8838,13 +8545,11 @@ class ExecutionLaunchDataParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, referencedFiles.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        kind.hashCode,
+        referencedFiles.hashCode,
+      );
 }
 
 /// execution.mapUri params
@@ -8929,13 +8634,11 @@ class ExecutionMapUriParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, uri.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        id.hashCode,
+        file.hashCode,
+        uri.hashCode,
+      );
 }
 
 /// execution.mapUri result
@@ -9013,12 +8716,10 @@ class ExecutionMapUriResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, uri.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        uri.hashCode,
+      );
 }
 
 /// ExecutionService
@@ -9130,11 +8831,7 @@ class ExecutionSetSubscriptionsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, subscriptions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => subscriptions.hashCode;
 }
 
 /// execution.setSubscriptions result
@@ -9158,9 +8855,7 @@ class ExecutionSetSubscriptionsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 287678780;
-  }
+  int get hashCode => 287678780;
 }
 
 /// ExistingImport
@@ -9225,12 +8920,10 @@ class ExistingImport implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, uri.hashCode);
-    hash = JenkinsSmiHash.combine(hash, elements.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        uri.hashCode,
+        elements.hashCode,
+      );
 }
 
 /// ExistingImports
@@ -9300,12 +8993,10 @@ class ExistingImports implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, elements.hashCode);
-    hash = JenkinsSmiHash.combine(hash, imports.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        elements.hashCode,
+        imports.hashCode,
+      );
 }
 
 /// extractLocalVariable feedback
@@ -9427,15 +9118,13 @@ class ExtractLocalVariableFeedback extends RefactoringFeedback {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, coveringExpressionOffsets.hashCode);
-    hash = JenkinsSmiHash.combine(hash, coveringExpressionLengths.hashCode);
-    hash = JenkinsSmiHash.combine(hash, names.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offsets.hashCode);
-    hash = JenkinsSmiHash.combine(hash, lengths.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        coveringExpressionOffsets.hashCode,
+        coveringExpressionLengths.hashCode,
+        names.hashCode,
+        offsets.hashCode,
+        lengths.hashCode,
+      );
 }
 
 /// extractLocalVariable options
@@ -9508,12 +9197,10 @@ class ExtractLocalVariableOptions extends RefactoringOptions {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, extractAll.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        name.hashCode,
+        extractAll.hashCode,
+      );
 }
 
 /// extractMethod feedback
@@ -9673,18 +9360,16 @@ class ExtractMethodFeedback extends RefactoringFeedback {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, returnType.hashCode);
-    hash = JenkinsSmiHash.combine(hash, names.hashCode);
-    hash = JenkinsSmiHash.combine(hash, canCreateGetter.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameters.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offsets.hashCode);
-    hash = JenkinsSmiHash.combine(hash, lengths.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+        returnType.hashCode,
+        names.hashCode,
+        canCreateGetter.hashCode,
+        parameters.hashCode,
+        offsets.hashCode,
+        lengths.hashCode,
+      );
 }
 
 /// extractMethod options
@@ -9817,15 +9502,13 @@ class ExtractMethodOptions extends RefactoringOptions {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, returnType.hashCode);
-    hash = JenkinsSmiHash.combine(hash, createGetter.hashCode);
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameters.hashCode);
-    hash = JenkinsSmiHash.combine(hash, extractAll.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        returnType.hashCode,
+        createGetter.hashCode,
+        name.hashCode,
+        parameters.hashCode,
+        extractAll.hashCode,
+      );
 }
 
 /// extractWidget feedback
@@ -9865,10 +9548,7 @@ class ExtractWidgetFeedback extends RefactoringFeedback {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => 0;
 }
 
 /// extractWidget options
@@ -9925,11 +9605,7 @@ class ExtractWidgetOptions extends RefactoringOptions {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => name.hashCode;
 }
 
 /// FileKind
@@ -10051,12 +9727,10 @@ class FlutterGetWidgetDescriptionParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// flutter.getWidgetDescription result
@@ -10130,11 +9804,7 @@ class FlutterGetWidgetDescriptionResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, properties.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => properties.hashCode;
 }
 
 /// FlutterOutline
@@ -10374,22 +10044,20 @@ class FlutterOutline implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, codeOffset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, codeLength.hashCode);
-    hash = JenkinsSmiHash.combine(hash, label.hashCode);
-    hash = JenkinsSmiHash.combine(hash, dartElement.hashCode);
-    hash = JenkinsSmiHash.combine(hash, attributes.hashCode);
-    hash = JenkinsSmiHash.combine(hash, className.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parentAssociationLabel.hashCode);
-    hash = JenkinsSmiHash.combine(hash, variableName.hashCode);
-    hash = JenkinsSmiHash.combine(hash, children.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        kind.hashCode,
+        offset.hashCode,
+        length.hashCode,
+        codeOffset.hashCode,
+        codeLength.hashCode,
+        label.hashCode,
+        dartElement.hashCode,
+        attributes.hashCode,
+        className.hashCode,
+        parentAssociationLabel.hashCode,
+        variableName.hashCode,
+        children.hashCode,
+      );
 }
 
 /// FlutterOutlineAttribute
@@ -10540,17 +10208,15 @@ class FlutterOutlineAttribute implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, label.hashCode);
-    hash = JenkinsSmiHash.combine(hash, literalValueBoolean.hashCode);
-    hash = JenkinsSmiHash.combine(hash, literalValueInteger.hashCode);
-    hash = JenkinsSmiHash.combine(hash, literalValueString.hashCode);
-    hash = JenkinsSmiHash.combine(hash, nameLocation.hashCode);
-    hash = JenkinsSmiHash.combine(hash, valueLocation.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        name.hashCode,
+        label.hashCode,
+        literalValueBoolean.hashCode,
+        literalValueInteger.hashCode,
+        literalValueString.hashCode,
+        nameLocation.hashCode,
+        valueLocation.hashCode,
+      );
 }
 
 /// FlutterOutlineKind
@@ -10710,12 +10376,10 @@ class FlutterOutlineParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, outline.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        outline.hashCode,
+      );
 }
 
 /// FlutterService
@@ -10832,11 +10496,7 @@ class FlutterSetSubscriptionsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, subscriptions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => subscriptions.hashCode;
 }
 
 /// flutter.setSubscriptions result
@@ -10860,9 +10520,7 @@ class FlutterSetSubscriptionsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 628296315;
-  }
+  int get hashCode => 628296315;
 }
 
 /// flutter.setWidgetPropertyValue params
@@ -10949,12 +10607,10 @@ class FlutterSetWidgetPropertyValueParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    hash = JenkinsSmiHash.combine(hash, value.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        id.hashCode,
+        value.hashCode,
+      );
 }
 
 /// flutter.setWidgetPropertyValue result
@@ -11019,11 +10675,7 @@ class FlutterSetWidgetPropertyValueResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, change.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => change.hashCode;
 }
 
 /// FlutterWidgetProperty
@@ -11214,19 +10866,17 @@ class FlutterWidgetProperty implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, documentation.hashCode);
-    hash = JenkinsSmiHash.combine(hash, expression.hashCode);
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    hash = JenkinsSmiHash.combine(hash, isRequired.hashCode);
-    hash = JenkinsSmiHash.combine(hash, isSafeToUpdate.hashCode);
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, children.hashCode);
-    hash = JenkinsSmiHash.combine(hash, editor.hashCode);
-    hash = JenkinsSmiHash.combine(hash, value.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        documentation.hashCode,
+        expression.hashCode,
+        id.hashCode,
+        isRequired.hashCode,
+        isSafeToUpdate.hashCode,
+        name.hashCode,
+        children.hashCode,
+        editor.hashCode,
+        value.hashCode,
+      );
 }
 
 /// FlutterWidgetPropertyEditor
@@ -11301,12 +10951,10 @@ class FlutterWidgetPropertyEditor implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, enumItems.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        kind.hashCode,
+        enumItems.hashCode,
+      );
 }
 
 /// FlutterWidgetPropertyEditorKind
@@ -11529,16 +11177,14 @@ class FlutterWidgetPropertyValue implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, boolValue.hashCode);
-    hash = JenkinsSmiHash.combine(hash, doubleValue.hashCode);
-    hash = JenkinsSmiHash.combine(hash, intValue.hashCode);
-    hash = JenkinsSmiHash.combine(hash, stringValue.hashCode);
-    hash = JenkinsSmiHash.combine(hash, enumValue.hashCode);
-    hash = JenkinsSmiHash.combine(hash, expression.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        boolValue.hashCode,
+        doubleValue.hashCode,
+        intValue.hashCode,
+        stringValue.hashCode,
+        enumValue.hashCode,
+        expression.hashCode,
+      );
 }
 
 /// FlutterWidgetPropertyValueEnumItem
@@ -11637,14 +11283,12 @@ class FlutterWidgetPropertyValueEnumItem implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, libraryUri.hashCode);
-    hash = JenkinsSmiHash.combine(hash, className.hashCode);
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, documentation.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        libraryUri.hashCode,
+        className.hashCode,
+        name.hashCode,
+        documentation.hashCode,
+      );
 }
 
 /// GeneralAnalysisService
@@ -11935,22 +11579,20 @@ class HoverInformation implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, containingLibraryPath.hashCode);
-    hash = JenkinsSmiHash.combine(hash, containingLibraryName.hashCode);
-    hash = JenkinsSmiHash.combine(hash, containingClassDescription.hashCode);
-    hash = JenkinsSmiHash.combine(hash, dartdoc.hashCode);
-    hash = JenkinsSmiHash.combine(hash, elementDescription.hashCode);
-    hash = JenkinsSmiHash.combine(hash, elementKind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, isDeprecated.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameter.hashCode);
-    hash = JenkinsSmiHash.combine(hash, propagatedType.hashCode);
-    hash = JenkinsSmiHash.combine(hash, staticType.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+        containingLibraryPath.hashCode,
+        containingLibraryName.hashCode,
+        containingClassDescription.hashCode,
+        dartdoc.hashCode,
+        elementDescription.hashCode,
+        elementKind.hashCode,
+        isDeprecated.hashCode,
+        parameter.hashCode,
+        propagatedType.hashCode,
+        staticType.hashCode,
+      );
 }
 
 /// ImplementedClass
@@ -12012,12 +11654,10 @@ class ImplementedClass implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+      );
 }
 
 /// ImplementedMember
@@ -12079,12 +11719,10 @@ class ImplementedMember implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+      );
 }
 
 /// ImportedElementSet
@@ -12163,13 +11801,11 @@ class ImportedElementSet implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, strings.hashCode);
-    hash = JenkinsSmiHash.combine(hash, uris.hashCode);
-    hash = JenkinsSmiHash.combine(hash, names.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        strings.hashCode,
+        uris.hashCode,
+        names.hashCode,
+      );
 }
 
 /// ImportedElements
@@ -12246,13 +11882,11 @@ class ImportedElements implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, path.hashCode);
-    hash = JenkinsSmiHash.combine(hash, prefix.hashCode);
-    hash = JenkinsSmiHash.combine(hash, elements.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        path.hashCode,
+        prefix.hashCode,
+        elements.hashCode,
+      );
 }
 
 /// IncludedSuggestionRelevanceTag
@@ -12318,12 +11952,10 @@ class IncludedSuggestionRelevanceTag implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, tag.hashCode);
-    hash = JenkinsSmiHash.combine(hash, relevanceBoost.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        tag.hashCode,
+        relevanceBoost.hashCode,
+      );
 }
 
 /// IncludedSuggestionSet
@@ -12409,13 +12041,11 @@ class IncludedSuggestionSet implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    hash = JenkinsSmiHash.combine(hash, relevance.hashCode);
-    hash = JenkinsSmiHash.combine(hash, displayUri.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        id.hashCode,
+        relevance.hashCode,
+        displayUri.hashCode,
+      );
 }
 
 /// inlineLocalVariable feedback
@@ -12479,12 +12109,10 @@ class InlineLocalVariableFeedback extends RefactoringFeedback {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, occurrences.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        name.hashCode,
+        occurrences.hashCode,
+      );
 }
 
 /// inlineLocalVariable options
@@ -12501,9 +12129,7 @@ class InlineLocalVariableOptions extends RefactoringOptions
   }
 
   @override
-  int get hashCode {
-    return 540364977;
-  }
+  int get hashCode => 540364977;
 }
 
 /// inlineMethod feedback
@@ -12585,13 +12211,11 @@ class InlineMethodFeedback extends RefactoringFeedback {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, className.hashCode);
-    hash = JenkinsSmiHash.combine(hash, methodName.hashCode);
-    hash = JenkinsSmiHash.combine(hash, isDeclaration.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        className.hashCode,
+        methodName.hashCode,
+        isDeclaration.hashCode,
+      );
 }
 
 /// inlineMethod options
@@ -12663,12 +12287,10 @@ class InlineMethodOptions extends RefactoringOptions {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, deleteSource.hashCode);
-    hash = JenkinsSmiHash.combine(hash, inlineAll.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        deleteSource.hashCode,
+        inlineAll.hashCode,
+      );
 }
 
 /// kythe.getKytheEntries params
@@ -12731,11 +12353,7 @@ class KytheGetKytheEntriesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => file.hashCode;
 }
 
 /// kythe.getKytheEntries result
@@ -12821,12 +12439,10 @@ class KytheGetKytheEntriesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, entries.hashCode);
-    hash = JenkinsSmiHash.combine(hash, files.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        entries.hashCode,
+        files.hashCode,
+      );
 }
 
 /// LibraryPathSet
@@ -12894,12 +12510,10 @@ class LibraryPathSet implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, scope.hashCode);
-    hash = JenkinsSmiHash.combine(hash, libraryPaths.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        scope.hashCode,
+        libraryPaths.hashCode,
+      );
 }
 
 /// moveFile feedback
@@ -12915,9 +12529,7 @@ class MoveFileFeedback extends RefactoringFeedback implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    return 438975893;
-  }
+  int get hashCode => 438975893;
 }
 
 /// moveFile options
@@ -12975,11 +12587,7 @@ class MoveFileOptions extends RefactoringOptions {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, newFile.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => newFile.hashCode;
 }
 
 /// OverriddenMember
@@ -13043,12 +12651,10 @@ class OverriddenMember implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, element.hashCode);
-    hash = JenkinsSmiHash.combine(hash, className.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        element.hashCode,
+        className.hashCode,
+      );
 }
 
 /// Override
@@ -13152,14 +12758,12 @@ class Override implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, superclassMember.hashCode);
-    hash = JenkinsSmiHash.combine(hash, interfaceMembers.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+        superclassMember.hashCode,
+        interfaceMembers.hashCode,
+      );
 }
 
 /// PostfixTemplateDescriptor
@@ -13234,13 +12838,11 @@ class PostfixTemplateDescriptor implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, key.hashCode);
-    hash = JenkinsSmiHash.combine(hash, example.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        name.hashCode,
+        key.hashCode,
+        example.hashCode,
+      );
 }
 
 /// PubStatus
@@ -13293,11 +12895,7 @@ class PubStatus implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, isListingPackageDirs.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => isListingPackageDirs.hashCode;
 }
 
 /// RefactoringFeedback
@@ -13333,10 +12931,7 @@ class RefactoringFeedback implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => 0;
 }
 
 /// RefactoringOptions
@@ -13371,10 +12966,7 @@ class RefactoringOptions implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => 0;
 }
 
 /// rename feedback
@@ -13465,14 +13057,12 @@ class RenameFeedback extends RefactoringFeedback {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, elementKindName.hashCode);
-    hash = JenkinsSmiHash.combine(hash, oldName.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+        elementKindName.hashCode,
+        oldName.hashCode,
+      );
 }
 
 /// rename options
@@ -13530,11 +13120,7 @@ class RenameOptions extends RefactoringOptions {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, newName.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => newName.hashCode;
 }
 
 /// RequestError
@@ -13614,13 +13200,11 @@ class RequestError implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, code.hashCode);
-    hash = JenkinsSmiHash.combine(hash, message.hashCode);
-    hash = JenkinsSmiHash.combine(hash, stackTrace.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        code.hashCode,
+        message.hashCode,
+        stackTrace.hashCode,
+      );
 }
 
 /// RequestErrorCode
@@ -14048,13 +13632,11 @@ class RuntimeCompletionExpression implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, type.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+        type.hashCode,
+      );
 }
 
 /// RuntimeCompletionExpressionType
@@ -14234,17 +13816,15 @@ class RuntimeCompletionExpressionType implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, libraryPath.hashCode);
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, typeArguments.hashCode);
-    hash = JenkinsSmiHash.combine(hash, returnType.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameterTypes.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameterNames.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        libraryPath.hashCode,
+        kind.hashCode,
+        name.hashCode,
+        typeArguments.hashCode,
+        returnType.hashCode,
+        parameterTypes.hashCode,
+        parameterNames.hashCode,
+      );
 }
 
 /// RuntimeCompletionExpressionTypeKind
@@ -14368,12 +13948,10 @@ class RuntimeCompletionVariable implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, type.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        name.hashCode,
+        type.hashCode,
+      );
 }
 
 /// search.findElementReferences params
@@ -14463,13 +14041,11 @@ class SearchFindElementReferencesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, includePotential.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+        includePotential.hashCode,
+      );
 }
 
 /// search.findElementReferences result
@@ -14553,12 +14129,10 @@ class SearchFindElementReferencesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    hash = JenkinsSmiHash.combine(hash, element.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        id.hashCode,
+        element.hashCode,
+      );
 }
 
 /// search.findMemberDeclarations params
@@ -14620,11 +14194,7 @@ class SearchFindMemberDeclarationsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => name.hashCode;
 }
 
 /// search.findMemberDeclarations result
@@ -14688,11 +14258,7 @@ class SearchFindMemberDeclarationsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => id.hashCode;
 }
 
 /// search.findMemberReferences params
@@ -14754,11 +14320,7 @@ class SearchFindMemberReferencesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => name.hashCode;
 }
 
 /// search.findMemberReferences result
@@ -14822,11 +14384,7 @@ class SearchFindMemberReferencesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => id.hashCode;
 }
 
 /// search.findTopLevelDeclarations params
@@ -14890,11 +14448,7 @@ class SearchFindTopLevelDeclarationsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, pattern.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => pattern.hashCode;
 }
 
 /// search.findTopLevelDeclarations result
@@ -14958,11 +14512,7 @@ class SearchFindTopLevelDeclarationsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => id.hashCode;
 }
 
 /// search.getElementDeclarations params
@@ -15058,13 +14608,11 @@ class SearchGetElementDeclarationsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, pattern.hashCode);
-    hash = JenkinsSmiHash.combine(hash, maxResults.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        pattern.hashCode,
+        maxResults.hashCode,
+      );
 }
 
 /// search.getElementDeclarations result
@@ -15147,12 +14695,10 @@ class SearchGetElementDeclarationsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, declarations.hashCode);
-    hash = JenkinsSmiHash.combine(hash, files.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        declarations.hashCode,
+        files.hashCode,
+      );
 }
 
 /// search.getTypeHierarchy params
@@ -15242,13 +14788,11 @@ class SearchGetTypeHierarchyParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, superOnly.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+        superOnly.hashCode,
+      );
 }
 
 /// search.getTypeHierarchy result
@@ -15328,11 +14872,7 @@ class SearchGetTypeHierarchyResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, hierarchyItems.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => hierarchyItems.hashCode;
 }
 
 /// SearchResult
@@ -15431,14 +14971,12 @@ class SearchResult implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, location.hashCode);
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, isPotential.hashCode);
-    hash = JenkinsSmiHash.combine(hash, path.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        location.hashCode,
+        kind.hashCode,
+        isPotential.hashCode,
+        path.hashCode,
+      );
 }
 
 /// SearchResultKind
@@ -15619,13 +15157,11 @@ class SearchResultsParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    hash = JenkinsSmiHash.combine(hash, results.hashCode);
-    hash = JenkinsSmiHash.combine(hash, isLast.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        id.hashCode,
+        results.hashCode,
+        isLast.hashCode,
+      );
 }
 
 /// server.connected params
@@ -15697,12 +15233,10 @@ class ServerConnectedParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, version.hashCode);
-    hash = JenkinsSmiHash.combine(hash, pid.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        version.hashCode,
+        pid.hashCode,
+      );
 }
 
 /// server.error params
@@ -15791,13 +15325,11 @@ class ServerErrorParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, isFatal.hashCode);
-    hash = JenkinsSmiHash.combine(hash, message.hashCode);
-    hash = JenkinsSmiHash.combine(hash, stackTrace.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        isFatal.hashCode,
+        message.hashCode,
+        stackTrace.hashCode,
+      );
 }
 
 /// server.getVersion params
@@ -15821,9 +15353,7 @@ class ServerGetVersionParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    return 55877452;
-  }
+  int get hashCode => 55877452;
 }
 
 /// server.getVersion result
@@ -15887,11 +15417,7 @@ class ServerGetVersionResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, version.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => version.hashCode;
 }
 
 /// ServerLogEntry
@@ -15968,13 +15494,11 @@ class ServerLogEntry implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, time.hashCode);
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, data.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        time.hashCode,
+        kind.hashCode,
+        data.hashCode,
+      );
 }
 
 /// ServerLogEntryKind
@@ -16121,11 +15645,7 @@ class ServerLogParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, entry.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => entry.hashCode;
 }
 
 /// ServerService
@@ -16242,11 +15762,7 @@ class ServerSetSubscriptionsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, subscriptions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => subscriptions.hashCode;
 }
 
 /// server.setSubscriptions result
@@ -16270,9 +15786,7 @@ class ServerSetSubscriptionsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 748820900;
-  }
+  int get hashCode => 748820900;
 }
 
 /// server.shutdown params
@@ -16296,9 +15810,7 @@ class ServerShutdownParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    return 366630911;
-  }
+  int get hashCode => 366630911;
 }
 
 /// server.shutdown result
@@ -16322,9 +15834,7 @@ class ServerShutdownResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 193626532;
-  }
+  int get hashCode => 193626532;
 }
 
 /// server.status params
@@ -16403,12 +15913,10 @@ class ServerStatusParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, analysis.hashCode);
-    hash = JenkinsSmiHash.combine(hash, pub.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        analysis.hashCode,
+        pub.hashCode,
+      );
 }
 
 /// TypeHierarchyItem
@@ -16568,15 +16076,13 @@ class TypeHierarchyItem implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, classElement.hashCode);
-    hash = JenkinsSmiHash.combine(hash, displayName.hashCode);
-    hash = JenkinsSmiHash.combine(hash, memberElement.hashCode);
-    hash = JenkinsSmiHash.combine(hash, superclass.hashCode);
-    hash = JenkinsSmiHash.combine(hash, interfaces.hashCode);
-    hash = JenkinsSmiHash.combine(hash, mixins.hashCode);
-    hash = JenkinsSmiHash.combine(hash, subclasses.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        classElement.hashCode,
+        displayName.hashCode,
+        memberElement.hashCode,
+        superclass.hashCode,
+        interfaces.hashCode,
+        mixins.hashCode,
+        subclasses.hashCode,
+      );
 }
diff --git a/pkg/analyzer/lib/src/context/context_root.dart b/pkg/analyzer/lib/src/context/context_root.dart
index d79e72c6974..515594793a2 100644
--- a/pkg/analyzer/lib/src/context/context_root.dart
+++ b/pkg/analyzer/lib/src/context/context_root.dart
@@ -2,7 +2,6 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-import 'package:analyzer/src/generated/utilities_general.dart';
 import 'package:path/path.dart' as path;
 
 /// Information about the root directory associated with an analysis context.
@@ -29,12 +28,7 @@ class ContextRoot {
   ContextRoot(this.root, this.exclude, {required this.pathContext});
 
   @override
-  int get hashCode {
-    int hash = 0;
-    hash = JenkinsSmiHash.combine(hash, root.hashCode);
-    hash = JenkinsSmiHash.combine(hash, exclude.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(root, exclude);
 
   @override
   bool operator ==(Object other) {
diff --git a/pkg/analyzer/lib/src/dart/analysis/dependency/node.dart b/pkg/analyzer/lib/src/dart/analysis/dependency/node.dart
index e99f61601ad..70eb2faa6bd 100644
--- a/pkg/analyzer/lib/src/dart/analysis/dependency/node.dart
+++ b/pkg/analyzer/lib/src/dart/analysis/dependency/node.dart
@@ -4,7 +4,6 @@
 
 import 'dart:typed_data';
 
-import 'package:analyzer/src/generated/utilities_general.dart';
 import 'package:convert/convert.dart';
 
 /// The reference to a class member.
@@ -23,7 +22,7 @@ class ClassMemberReference {
   final int hashCode;
 
   ClassMemberReference(this.target, this.name)
-      : hashCode = JenkinsSmiHash.hash2(target.hashCode, name.hashCode);
+      : hashCode = Object.hash(target.hashCode, name.hashCode);
 
   @override
   bool operator ==(Object other) {
@@ -121,7 +120,7 @@ class LibraryQualifiedName {
 
   factory LibraryQualifiedName(Uri libraryUri, String name) {
     var isPrivate = name.startsWith('_');
-    var hashCode = JenkinsSmiHash.hash2(libraryUri.hashCode, name.hashCode);
+    var hashCode = Object.hash(libraryUri.hashCode, name.hashCode);
     return LibraryQualifiedName._internal(
         libraryUri, name, isPrivate, hashCode);
   }
diff --git a/pkg/analyzer/lib/src/dart/analysis/experiments.dart b/pkg/analyzer/lib/src/dart/analysis/experiments.dart
index 88ced1a46e7..7d994071ab9 100644
--- a/pkg/analyzer/lib/src/dart/analysis/experiments.dart
+++ b/pkg/analyzer/lib/src/dart/analysis/experiments.dart
@@ -6,7 +6,6 @@ import 'dart:typed_data';
 
 import 'package:analyzer/dart/analysis/features.dart';
 import 'package:analyzer/src/dart/analysis/experiments_impl.dart';
-import 'package:analyzer/src/generated/utilities_general.dart';
 import 'package:meta/meta.dart';
 import 'package:pub_semver/src/version.dart';
 
@@ -172,13 +171,7 @@ class ExperimentStatus with _CurrentState implements FeatureSet {
   );
 
   @override
-  int get hashCode {
-    int hash = 0;
-    for (var flag in _flags) {
-      hash = JenkinsSmiHash.combine(hash, flag.hashCode);
-    }
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hashAll(_flags);
 
   @override
   bool operator ==(Object other) {
diff --git a/pkg/analyzer/lib/src/dart/constant/value.dart b/pkg/analyzer/lib/src/dart/constant/value.dart
index 9f5cd4282d3..80943a1a34b 100644
--- a/pkg/analyzer/lib/src/dart/constant/value.dart
+++ b/pkg/analyzer/lib/src/dart/constant/value.dart
@@ -13,7 +13,6 @@ import 'package:analyzer/error/error.dart';
 import 'package:analyzer/src/dart/constant/has_type_parameter_reference.dart';
 import 'package:analyzer/src/dart/element/type_system.dart';
 import 'package:analyzer/src/error/codes.dart';
-import 'package:analyzer/src/generated/utilities_general.dart';
 import 'package:meta/meta.dart';
 
 /// The state of an object representing a boolean value.
@@ -185,7 +184,7 @@ class DartObjectImpl implements DartObject {
   Map<String, DartObjectImpl>? get fields => _state.fields;
 
   @override
-  int get hashCode => JenkinsSmiHash.hash2(type.hashCode, _state.hashCode);
+  int get hashCode => Object.hash(type.hashCode, _state.hashCode);
 
   @override
   bool get hasKnownValue => !_state.isUnknown;
diff --git a/pkg/analyzer/lib/src/dart/element/element.dart b/pkg/analyzer/lib/src/dart/element/element.dart
index edcf6c35613..9c3a24d48dd 100644
--- a/pkg/analyzer/lib/src/dart/element/element.dart
+++ b/pkg/analyzer/lib/src/dart/element/element.dart
@@ -42,7 +42,6 @@ import 'package:analyzer/src/generated/sdk.dart' show DartSdk;
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/utilities_collection.dart';
 import 'package:analyzer/src/generated/utilities_dart.dart';
-import 'package:analyzer/src/generated/utilities_general.dart';
 import 'package:analyzer/src/macro/impl/error.dart' as macro;
 import 'package:analyzer/src/summary2/ast_binary_tokens.dart';
 import 'package:analyzer/src/summary2/bundle_reader.dart';
@@ -2735,14 +2734,7 @@ class ElementLocationImpl implements ElementLocation {
   }
 
   @override
-  int get hashCode {
-    int result = 0;
-    for (int i = 0; i < _components.length; i++) {
-      String component = _components[i];
-      result = JenkinsSmiHash.combine(result, component.hashCode);
-    }
-    return result;
-  }
+  int get hashCode => Object.hashAll(_components);
 
   @override
   bool operator ==(Object object) {
diff --git a/pkg/analyzer/lib/src/dart/element/inheritance_manager3.dart b/pkg/analyzer/lib/src/dart/element/inheritance_manager3.dart
index 86ad536036e..1be5afd72b6 100644
--- a/pkg/analyzer/lib/src/dart/element/inheritance_manager3.dart
+++ b/pkg/analyzer/lib/src/dart/element/inheritance_manager3.dart
@@ -8,7 +8,6 @@ import 'package:analyzer/src/dart/element/element.dart';
 import 'package:analyzer/src/dart/element/member.dart';
 import 'package:analyzer/src/dart/element/type_algebra.dart';
 import 'package:analyzer/src/dart/element/type_system.dart';
-import 'package:analyzer/src/generated/utilities_general.dart';
 
 /// Failure because of there is no most specific signature in [candidates].
 class CandidatesConflict extends Conflict {
@@ -885,7 +884,7 @@ class Name {
 
   factory Name(Uri? libraryUri, String name) {
     if (name.startsWith('_')) {
-      var hashCode = JenkinsSmiHash.hash2(libraryUri.hashCode, name.hashCode);
+      var hashCode = Object.hash(libraryUri.hashCode, name.hashCode);
       return Name._internal(libraryUri, name, false, hashCode);
     } else {
       return Name._internal(null, name, true, name.hashCode);
diff --git a/pkg/analyzer/lib/src/generated/utilities_general.dart b/pkg/analyzer/lib/src/generated/utilities_general.dart
index bfd1e087aa3..d9e674295a8 100644
--- a/pkg/analyzer/lib/src/generated/utilities_general.dart
+++ b/pkg/analyzer/lib/src/generated/utilities_general.dart
@@ -42,58 +42,6 @@ String? toLowerCase(Object? value) => value?.toString().toLowerCase();
 /// null.
 String? toUpperCase(Object? value) => value?.toString().toUpperCase();
 
-/// Jenkins hash function, optimized for small integers.
-///
-/// Static methods borrowed from sdk/lib/math/jenkins_smi_hash.dart.  Non-static
-/// methods are an enhancement for the "front_end" package.
-///
-/// Where performance is critical, use [hash2], [hash3], or [hash4], or the
-/// pattern `finish(combine(combine(...combine(0, a), b)..., z))`, where a..z
-/// are hash codes to be combined.
-///
-/// For ease of use, you may also use this pattern:
-/// `(new JenkinsSmiHash()..add(a)..add(b)....add(z)).hashCode`, where a..z are
-/// the sub-objects whose hashes should be combined.  This pattern performs the
-/// same operations as the performance critical variant, but allocates an extra
-/// object.
-class JenkinsSmiHash {
-  int _hash = 0;
-
-  /// Finalizes the hash and return the resulting hashcode.
-  @override
-  int get hashCode => finish(_hash);
-
-  /// Accumulates the object [o] into the hash.
-  void add(Object o) {
-    _hash = combine(_hash, o.hashCode);
-  }
-
-  /// Accumulates the hash code [value] into the running hash [hash].
-  static int combine(int hash, int value) {
-    hash = 0x1fffffff & (hash + value);
-    hash = 0x1fffffff & (hash + ((0x0007ffff & hash) << 10));
-    return hash ^ (hash >> 6);
-  }
-
-  /// Finalizes a running hash produced by [combine].
-  static int finish(int hash) {
-    hash = 0x1fffffff & (hash + ((0x03ffffff & hash) << 3));
-    hash = hash ^ (hash >> 11);
-    return 0x1fffffff & (hash + ((0x00003fff & hash) << 15));
-  }
-
-  /// Combines together two hash codes.
-  static int hash2(int a, int b) => finish(combine(combine(0, a), b));
-
-  /// Combines together three hash codes.
-  static int hash3(int a, int b, int c) =>
-      finish(combine(combine(combine(0, a), b), c));
-
-  /// Combines together four hash codes.
-  static int hash4(int a, int b, int c, int d) =>
-      finish(combine(combine(combine(combine(0, a), b), c), d));
-}
-
 /// A simple limited queue.
 class LimitedQueue<E> extends ListQueue<E> {
   final int limit;
diff --git a/pkg/analyzer/pubspec.yaml b/pkg/analyzer/pubspec.yaml
index 6a3198e3798..3b0dae7bdff 100644
--- a/pkg/analyzer/pubspec.yaml
+++ b/pkg/analyzer/pubspec.yaml
@@ -4,7 +4,7 @@ description: This package provides a library that performs static analysis of Da
 homepage: https://github.com/dart-lang/sdk/tree/main/pkg/analyzer
 
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: '>=2.14.0 <3.0.0'
 
 dependencies:
   _fe_analyzer_shared: ^26.0.0
diff --git a/pkg/analyzer_plugin/lib/protocol/protocol_common.dart b/pkg/analyzer_plugin/lib/protocol/protocol_common.dart
index 65b670419b5..2e566d73279 100644
--- a/pkg/analyzer_plugin/lib/protocol/protocol_common.dart
+++ b/pkg/analyzer_plugin/lib/protocol/protocol_common.dart
@@ -8,7 +8,6 @@
 
 import 'dart:convert' hide JsonDecoder;
 
-import 'package:analyzer/src/generated/utilities_general.dart';
 import 'package:analyzer_plugin/protocol/protocol.dart';
 import 'package:analyzer_plugin/src/protocol/protocol_internal.dart';
 
@@ -66,12 +65,10 @@ class AddContentOverlay implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, 704418402);
-    hash = JenkinsSmiHash.combine(hash, content.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        704418402,
+        content.hashCode,
+      );
 }
 
 /// AnalysisError
@@ -252,19 +249,17 @@ class AnalysisError implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, severity.hashCode);
-    hash = JenkinsSmiHash.combine(hash, type.hashCode);
-    hash = JenkinsSmiHash.combine(hash, location.hashCode);
-    hash = JenkinsSmiHash.combine(hash, message.hashCode);
-    hash = JenkinsSmiHash.combine(hash, correction.hashCode);
-    hash = JenkinsSmiHash.combine(hash, code.hashCode);
-    hash = JenkinsSmiHash.combine(hash, url.hashCode);
-    hash = JenkinsSmiHash.combine(hash, contextMessages.hashCode);
-    hash = JenkinsSmiHash.combine(hash, hasFix.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        severity.hashCode,
+        type.hashCode,
+        location.hashCode,
+        message.hashCode,
+        correction.hashCode,
+        code.hashCode,
+        url.hashCode,
+        contextMessages.hashCode,
+        hasFix.hashCode,
+      );
 }
 
 /// AnalysisErrorSeverity
@@ -477,12 +472,10 @@ class ChangeContentOverlay implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, 873118866);
-    hash = JenkinsSmiHash.combine(hash, edits.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        873118866,
+        edits.hashCode,
+      );
 }
 
 /// CompletionSuggestion
@@ -918,33 +911,31 @@ class CompletionSuggestion implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, relevance.hashCode);
-    hash = JenkinsSmiHash.combine(hash, completion.hashCode);
-    hash = JenkinsSmiHash.combine(hash, displayText.hashCode);
-    hash = JenkinsSmiHash.combine(hash, replacementOffset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, replacementLength.hashCode);
-    hash = JenkinsSmiHash.combine(hash, selectionOffset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, selectionLength.hashCode);
-    hash = JenkinsSmiHash.combine(hash, isDeprecated.hashCode);
-    hash = JenkinsSmiHash.combine(hash, isPotential.hashCode);
-    hash = JenkinsSmiHash.combine(hash, docSummary.hashCode);
-    hash = JenkinsSmiHash.combine(hash, docComplete.hashCode);
-    hash = JenkinsSmiHash.combine(hash, declaringType.hashCode);
-    hash = JenkinsSmiHash.combine(hash, defaultArgumentListString.hashCode);
-    hash = JenkinsSmiHash.combine(hash, defaultArgumentListTextRanges.hashCode);
-    hash = JenkinsSmiHash.combine(hash, element.hashCode);
-    hash = JenkinsSmiHash.combine(hash, returnType.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameterNames.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameterTypes.hashCode);
-    hash = JenkinsSmiHash.combine(hash, requiredParameterCount.hashCode);
-    hash = JenkinsSmiHash.combine(hash, hasNamedParameters.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameterName.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameterType.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hashAll([
+        kind.hashCode,
+        relevance.hashCode,
+        completion.hashCode,
+        displayText.hashCode,
+        replacementOffset.hashCode,
+        replacementLength.hashCode,
+        selectionOffset.hashCode,
+        selectionLength.hashCode,
+        isDeprecated.hashCode,
+        isPotential.hashCode,
+        docSummary.hashCode,
+        docComplete.hashCode,
+        declaringType.hashCode,
+        defaultArgumentListString.hashCode,
+        defaultArgumentListTextRanges.hashCode,
+        element.hashCode,
+        returnType.hashCode,
+        parameterNames.hashCode,
+        parameterTypes.hashCode,
+        requiredParameterCount.hashCode,
+        hasNamedParameters.hashCode,
+        parameterName.hashCode,
+        parameterType.hashCode,
+      ]);
 }
 
 /// CompletionSuggestionKind
@@ -1139,12 +1130,10 @@ class DiagnosticMessage implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, message.hashCode);
-    hash = JenkinsSmiHash.combine(hash, location.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        message.hashCode,
+        location.hashCode,
+      );
 }
 
 /// Element
@@ -1347,18 +1336,16 @@ class Element implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, location.hashCode);
-    hash = JenkinsSmiHash.combine(hash, flags.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameters.hashCode);
-    hash = JenkinsSmiHash.combine(hash, returnType.hashCode);
-    hash = JenkinsSmiHash.combine(hash, typeParameters.hashCode);
-    hash = JenkinsSmiHash.combine(hash, aliasedType.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        kind.hashCode,
+        name.hashCode,
+        location.hashCode,
+        flags.hashCode,
+        parameters.hashCode,
+        returnType.hashCode,
+        typeParameters.hashCode,
+        aliasedType.hashCode,
+      );
 }
 
 /// ElementKind
@@ -1753,13 +1740,11 @@ class FoldingRegion implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        kind.hashCode,
+        offset.hashCode,
+        length.hashCode,
+      );
 }
 
 /// HighlightRegion
@@ -1835,13 +1820,11 @@ class HighlightRegion implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, type.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        type.hashCode,
+        offset.hashCode,
+        length.hashCode,
+      );
 }
 
 /// HighlightRegionType
@@ -2545,15 +2528,13 @@ class KytheEntry implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, source.hashCode);
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, target.hashCode);
-    hash = JenkinsSmiHash.combine(hash, fact.hashCode);
-    hash = JenkinsSmiHash.combine(hash, value.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        source.hashCode,
+        kind.hashCode,
+        target.hashCode,
+        fact.hashCode,
+        value.hashCode,
+      );
 }
 
 /// KytheVName
@@ -2659,15 +2640,13 @@ class KytheVName implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, signature.hashCode);
-    hash = JenkinsSmiHash.combine(hash, corpus.hashCode);
-    hash = JenkinsSmiHash.combine(hash, root.hashCode);
-    hash = JenkinsSmiHash.combine(hash, path.hashCode);
-    hash = JenkinsSmiHash.combine(hash, language.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        signature.hashCode,
+        corpus.hashCode,
+        root.hashCode,
+        path.hashCode,
+        language.hashCode,
+      );
 }
 
 /// LinkedEditGroup
@@ -2770,13 +2749,11 @@ class LinkedEditGroup implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, positions.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, suggestions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        positions.hashCode,
+        length.hashCode,
+        suggestions.hashCode,
+      );
 }
 
 /// LinkedEditSuggestion
@@ -2839,12 +2816,10 @@ class LinkedEditSuggestion implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, value.hashCode);
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        value.hashCode,
+        kind.hashCode,
+      );
 }
 
 /// LinkedEditSuggestionKind
@@ -3043,17 +3018,15 @@ class Location implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, startLine.hashCode);
-    hash = JenkinsSmiHash.combine(hash, startColumn.hashCode);
-    hash = JenkinsSmiHash.combine(hash, endLine.hashCode);
-    hash = JenkinsSmiHash.combine(hash, endColumn.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+        length.hashCode,
+        startLine.hashCode,
+        startColumn.hashCode,
+        endLine.hashCode,
+        endColumn.hashCode,
+      );
 }
 
 /// NavigationRegion
@@ -3131,13 +3104,11 @@ class NavigationRegion implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, targets.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+        targets.hashCode,
+      );
 }
 
 /// NavigationTarget
@@ -3287,18 +3258,16 @@ class NavigationTarget implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, fileIndex.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, startLine.hashCode);
-    hash = JenkinsSmiHash.combine(hash, startColumn.hashCode);
-    hash = JenkinsSmiHash.combine(hash, codeOffset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, codeLength.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        kind.hashCode,
+        fileIndex.hashCode,
+        offset.hashCode,
+        length.hashCode,
+        startLine.hashCode,
+        startColumn.hashCode,
+        codeOffset.hashCode,
+        codeLength.hashCode,
+      );
 }
 
 /// Occurrences
@@ -3375,13 +3344,11 @@ class Occurrences implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, element.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offsets.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        element.hashCode,
+        offsets.hashCode,
+        length.hashCode,
+      );
 }
 
 /// Outline
@@ -3509,16 +3476,14 @@ class Outline implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, element.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, codeOffset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, codeLength.hashCode);
-    hash = JenkinsSmiHash.combine(hash, children.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        element.hashCode,
+        offset.hashCode,
+        length.hashCode,
+        codeOffset.hashCode,
+        codeLength.hashCode,
+        children.hashCode,
+      );
 }
 
 /// ParameterInfo
@@ -3609,14 +3574,12 @@ class ParameterInfo implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, type.hashCode);
-    hash = JenkinsSmiHash.combine(hash, defaultValue.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        kind.hashCode,
+        name.hashCode,
+        type.hashCode,
+        defaultValue.hashCode,
+      );
 }
 
 /// ParameterKind
@@ -3748,12 +3711,10 @@ class Position implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// RefactoringKind
@@ -3963,15 +3924,13 @@ class RefactoringMethodParameter implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, type.hashCode);
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameters.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        id.hashCode,
+        kind.hashCode,
+        type.hashCode,
+        name.hashCode,
+        parameters.hashCode,
+      );
 }
 
 /// RefactoringMethodParameterKind
@@ -4111,13 +4070,11 @@ class RefactoringProblem implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, severity.hashCode);
-    hash = JenkinsSmiHash.combine(hash, message.hashCode);
-    hash = JenkinsSmiHash.combine(hash, location.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        severity.hashCode,
+        message.hashCode,
+        location.hashCode,
+      );
 }
 
 /// RefactoringProblemSeverity
@@ -4248,11 +4205,7 @@ class RemoveContentOverlay implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, 114870849);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => 114870849;
 }
 
 /// SourceChange
@@ -4397,15 +4350,13 @@ class SourceChange implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, message.hashCode);
-    hash = JenkinsSmiHash.combine(hash, edits.hashCode);
-    hash = JenkinsSmiHash.combine(hash, linkedEditGroups.hashCode);
-    hash = JenkinsSmiHash.combine(hash, selection.hashCode);
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        message.hashCode,
+        edits.hashCode,
+        linkedEditGroups.hashCode,
+        selection.hashCode,
+        id.hashCode,
+      );
 }
 
 /// SourceEdit
@@ -4512,14 +4463,12 @@ class SourceEdit implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, replacement.hashCode);
-    hash = JenkinsSmiHash.combine(hash, id.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+        replacement.hashCode,
+        id.hashCode,
+      );
 }
 
 /// SourceFileEdit
@@ -4610,11 +4559,9 @@ class SourceFileEdit implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, fileStamp.hashCode);
-    hash = JenkinsSmiHash.combine(hash, edits.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        fileStamp.hashCode,
+        edits.hashCode,
+      );
 }
diff --git a/pkg/analyzer_plugin/lib/protocol/protocol_generated.dart b/pkg/analyzer_plugin/lib/protocol/protocol_generated.dart
index 937d5c275b2..ac23e9237f0 100644
--- a/pkg/analyzer_plugin/lib/protocol/protocol_generated.dart
+++ b/pkg/analyzer_plugin/lib/protocol/protocol_generated.dart
@@ -8,7 +8,6 @@
 
 import 'dart:convert' hide JsonDecoder;
 
-import 'package:analyzer/src/generated/utilities_general.dart';
 import 'package:analyzer_plugin/protocol/protocol.dart';
 import 'package:analyzer_plugin/src/protocol/protocol_internal.dart';
 import 'package:analyzer_plugin/protocol/protocol_common.dart';
@@ -81,12 +80,10 @@ class AnalysisErrorFixes implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, error.hashCode);
-    hash = JenkinsSmiHash.combine(hash, fixes.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        error.hashCode,
+        fixes.hashCode,
+      );
 }
 
 /// analysis.errors params
@@ -164,12 +161,10 @@ class AnalysisErrorsParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, errors.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        errors.hashCode,
+      );
 }
 
 /// analysis.folding params
@@ -247,12 +242,10 @@ class AnalysisFoldingParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, regions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        regions.hashCode,
+      );
 }
 
 /// analysis.getNavigation params
@@ -340,13 +333,11 @@ class AnalysisGetNavigationParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+        length.hashCode,
+      );
 }
 
 /// analysis.getNavigation result
@@ -449,13 +440,11 @@ class AnalysisGetNavigationResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, files.hashCode);
-    hash = JenkinsSmiHash.combine(hash, targets.hashCode);
-    hash = JenkinsSmiHash.combine(hash, regions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        files.hashCode,
+        targets.hashCode,
+        regions.hashCode,
+      );
 }
 
 /// analysis.handleWatchEvents params
@@ -523,11 +512,7 @@ class AnalysisHandleWatchEventsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, events.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => events.hashCode;
 }
 
 /// analysis.handleWatchEvents result
@@ -551,9 +536,7 @@ class AnalysisHandleWatchEventsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 779767607;
-  }
+  int get hashCode => 779767607;
 }
 
 /// analysis.highlights params
@@ -631,12 +614,10 @@ class AnalysisHighlightsParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, regions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        regions.hashCode,
+      );
 }
 
 /// analysis.navigation params
@@ -747,14 +728,12 @@ class AnalysisNavigationParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, regions.hashCode);
-    hash = JenkinsSmiHash.combine(hash, targets.hashCode);
-    hash = JenkinsSmiHash.combine(hash, files.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        regions.hashCode,
+        targets.hashCode,
+        files.hashCode,
+      );
 }
 
 /// analysis.occurrences params
@@ -833,12 +812,10 @@ class AnalysisOccurrencesParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, occurrences.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        occurrences.hashCode,
+      );
 }
 
 /// analysis.outline params
@@ -914,12 +891,10 @@ class AnalysisOutlineParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, outline.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        outline.hashCode,
+      );
 }
 
 /// AnalysisService
@@ -1056,11 +1031,7 @@ class AnalysisSetContextRootsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, roots.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => roots.hashCode;
 }
 
 /// analysis.setContextRoots result
@@ -1084,9 +1055,7 @@ class AnalysisSetContextRootsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 969645618;
-  }
+  int get hashCode => 969645618;
 }
 
 /// analysis.setPriorityFiles params
@@ -1149,11 +1118,7 @@ class AnalysisSetPriorityFilesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, files.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => files.hashCode;
 }
 
 /// analysis.setPriorityFiles result
@@ -1177,9 +1142,7 @@ class AnalysisSetPriorityFilesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 330050055;
-  }
+  int get hashCode => 330050055;
 }
 
 /// analysis.setSubscriptions params
@@ -1252,11 +1215,7 @@ class AnalysisSetSubscriptionsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, subscriptions.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => subscriptions.hashCode;
 }
 
 /// analysis.setSubscriptions result
@@ -1280,9 +1239,7 @@ class AnalysisSetSubscriptionsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 218088493;
-  }
+  int get hashCode => 218088493;
 }
 
 /// analysis.updateContent params
@@ -1356,11 +1313,7 @@ class AnalysisUpdateContentParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, files.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => files.hashCode;
 }
 
 /// analysis.updateContent result
@@ -1384,9 +1337,7 @@ class AnalysisUpdateContentResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 468798730;
-  }
+  int get hashCode => 468798730;
 }
 
 /// completion.getSuggestions params
@@ -1459,12 +1410,10 @@ class CompletionGetSuggestionsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// completion.getSuggestions result
@@ -1572,13 +1521,11 @@ class CompletionGetSuggestionsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, replacementOffset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, replacementLength.hashCode);
-    hash = JenkinsSmiHash.combine(hash, results.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        replacementOffset.hashCode,
+        replacementLength.hashCode,
+        results.hashCode,
+      );
 }
 
 /// ContextRoot
@@ -1659,13 +1606,11 @@ class ContextRoot implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, root.hashCode);
-    hash = JenkinsSmiHash.combine(hash, exclude.hashCode);
-    hash = JenkinsSmiHash.combine(hash, optionsFile.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        root.hashCode,
+        exclude.hashCode,
+        optionsFile.hashCode,
+      );
 }
 
 /// convertGetterToMethod feedback
@@ -1682,9 +1627,7 @@ class ConvertGetterToMethodFeedback extends RefactoringFeedback
   }
 
   @override
-  int get hashCode {
-    return 616032599;
-  }
+  int get hashCode => 616032599;
 }
 
 /// convertGetterToMethod options
@@ -1701,9 +1644,7 @@ class ConvertGetterToMethodOptions extends RefactoringOptions
   }
 
   @override
-  int get hashCode {
-    return 488848400;
-  }
+  int get hashCode => 488848400;
 }
 
 /// convertMethodToGetter feedback
@@ -1720,9 +1661,7 @@ class ConvertMethodToGetterFeedback extends RefactoringFeedback
   }
 
   @override
-  int get hashCode {
-    return 165291526;
-  }
+  int get hashCode => 165291526;
 }
 
 /// convertMethodToGetter options
@@ -1739,9 +1678,7 @@ class ConvertMethodToGetterOptions extends RefactoringOptions
   }
 
   @override
-  int get hashCode {
-    return 27952290;
-  }
+  int get hashCode => 27952290;
 }
 
 /// edit.getAssists params
@@ -1826,13 +1763,11 @@ class EditGetAssistsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+        length.hashCode,
+      );
 }
 
 /// edit.getAssists result
@@ -1901,11 +1836,7 @@ class EditGetAssistsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, assists.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => assists.hashCode;
 }
 
 /// edit.getAvailableRefactorings params
@@ -1991,13 +1922,11 @@ class EditGetAvailableRefactoringsParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+        length.hashCode,
+      );
 }
 
 /// edit.getAvailableRefactorings result
@@ -2072,11 +2001,7 @@ class EditGetAvailableRefactoringsResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, kinds.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => kinds.hashCode;
 }
 
 /// edit.getFixes params
@@ -2148,12 +2073,10 @@ class EditGetFixesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        file.hashCode,
+        offset.hashCode,
+      );
 }
 
 /// edit.getFixes result
@@ -2222,11 +2145,7 @@ class EditGetFixesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, fixes.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => fixes.hashCode;
 }
 
 /// edit.getRefactoring params
@@ -2361,16 +2280,14 @@ class EditGetRefactoringParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, validateOnly.hashCode);
-    hash = JenkinsSmiHash.combine(hash, options.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        kind.hashCode,
+        file.hashCode,
+        offset.hashCode,
+        length.hashCode,
+        validateOnly.hashCode,
+        options.hashCode,
+      );
 }
 
 /// edit.getRefactoring result
@@ -2542,16 +2459,14 @@ class EditGetRefactoringResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, initialProblems.hashCode);
-    hash = JenkinsSmiHash.combine(hash, optionsProblems.hashCode);
-    hash = JenkinsSmiHash.combine(hash, finalProblems.hashCode);
-    hash = JenkinsSmiHash.combine(hash, feedback.hashCode);
-    hash = JenkinsSmiHash.combine(hash, change.hashCode);
-    hash = JenkinsSmiHash.combine(hash, potentialEdits.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        initialProblems.hashCode,
+        optionsProblems.hashCode,
+        finalProblems.hashCode,
+        feedback.hashCode,
+        change.hashCode,
+        potentialEdits.hashCode,
+      );
 }
 
 /// extractLocalVariable feedback
@@ -2673,15 +2588,13 @@ class ExtractLocalVariableFeedback extends RefactoringFeedback {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, coveringExpressionOffsets.hashCode);
-    hash = JenkinsSmiHash.combine(hash, coveringExpressionLengths.hashCode);
-    hash = JenkinsSmiHash.combine(hash, names.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offsets.hashCode);
-    hash = JenkinsSmiHash.combine(hash, lengths.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        coveringExpressionOffsets.hashCode,
+        coveringExpressionLengths.hashCode,
+        names.hashCode,
+        offsets.hashCode,
+        lengths.hashCode,
+      );
 }
 
 /// extractLocalVariable options
@@ -2754,12 +2667,10 @@ class ExtractLocalVariableOptions extends RefactoringOptions {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, extractAll.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        name.hashCode,
+        extractAll.hashCode,
+      );
 }
 
 /// extractMethod feedback
@@ -2919,18 +2830,16 @@ class ExtractMethodFeedback extends RefactoringFeedback {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, returnType.hashCode);
-    hash = JenkinsSmiHash.combine(hash, names.hashCode);
-    hash = JenkinsSmiHash.combine(hash, canCreateGetter.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameters.hashCode);
-    hash = JenkinsSmiHash.combine(hash, offsets.hashCode);
-    hash = JenkinsSmiHash.combine(hash, lengths.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+        returnType.hashCode,
+        names.hashCode,
+        canCreateGetter.hashCode,
+        parameters.hashCode,
+        offsets.hashCode,
+        lengths.hashCode,
+      );
 }
 
 /// extractMethod options
@@ -3063,15 +2972,13 @@ class ExtractMethodOptions extends RefactoringOptions {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, returnType.hashCode);
-    hash = JenkinsSmiHash.combine(hash, createGetter.hashCode);
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, parameters.hashCode);
-    hash = JenkinsSmiHash.combine(hash, extractAll.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        returnType.hashCode,
+        createGetter.hashCode,
+        name.hashCode,
+        parameters.hashCode,
+        extractAll.hashCode,
+      );
 }
 
 /// inlineLocalVariable feedback
@@ -3135,12 +3042,10 @@ class InlineLocalVariableFeedback extends RefactoringFeedback {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, occurrences.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        name.hashCode,
+        occurrences.hashCode,
+      );
 }
 
 /// inlineLocalVariable options
@@ -3157,9 +3062,7 @@ class InlineLocalVariableOptions extends RefactoringOptions
   }
 
   @override
-  int get hashCode {
-    return 540364977;
-  }
+  int get hashCode => 540364977;
 }
 
 /// inlineMethod feedback
@@ -3241,13 +3144,11 @@ class InlineMethodFeedback extends RefactoringFeedback {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, className.hashCode);
-    hash = JenkinsSmiHash.combine(hash, methodName.hashCode);
-    hash = JenkinsSmiHash.combine(hash, isDeclaration.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        className.hashCode,
+        methodName.hashCode,
+        isDeclaration.hashCode,
+      );
 }
 
 /// inlineMethod options
@@ -3319,12 +3220,10 @@ class InlineMethodOptions extends RefactoringOptions {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, deleteSource.hashCode);
-    hash = JenkinsSmiHash.combine(hash, inlineAll.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        deleteSource.hashCode,
+        inlineAll.hashCode,
+      );
 }
 
 /// kythe.getKytheEntries params
@@ -3387,11 +3286,7 @@ class KytheGetKytheEntriesParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, file.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => file.hashCode;
 }
 
 /// kythe.getKytheEntries result
@@ -3477,12 +3372,10 @@ class KytheGetKytheEntriesResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, entries.hashCode);
-    hash = JenkinsSmiHash.combine(hash, files.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        entries.hashCode,
+        files.hashCode,
+      );
 }
 
 /// moveFile feedback
@@ -3498,9 +3391,7 @@ class MoveFileFeedback extends RefactoringFeedback implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    return 438975893;
-  }
+  int get hashCode => 438975893;
 }
 
 /// moveFile options
@@ -3558,11 +3449,7 @@ class MoveFileOptions extends RefactoringOptions {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, newFile.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => newFile.hashCode;
 }
 
 /// plugin.error params
@@ -3653,13 +3540,11 @@ class PluginErrorParams implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, isFatal.hashCode);
-    hash = JenkinsSmiHash.combine(hash, message.hashCode);
-    hash = JenkinsSmiHash.combine(hash, stackTrace.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        isFatal.hashCode,
+        message.hashCode,
+        stackTrace.hashCode,
+      );
 }
 
 /// plugin.shutdown params
@@ -3683,9 +3568,7 @@ class PluginShutdownParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    return 478064585;
-  }
+  int get hashCode => 478064585;
 }
 
 /// plugin.shutdown result
@@ -3709,9 +3592,7 @@ class PluginShutdownResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    return 9389109;
-  }
+  int get hashCode => 9389109;
 }
 
 /// plugin.versionCheck params
@@ -3802,13 +3683,11 @@ class PluginVersionCheckParams implements RequestParams {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, byteStorePath.hashCode);
-    hash = JenkinsSmiHash.combine(hash, sdkPath.hashCode);
-    hash = JenkinsSmiHash.combine(hash, version.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        byteStorePath.hashCode,
+        sdkPath.hashCode,
+        version.hashCode,
+      );
 }
 
 /// plugin.versionCheck result
@@ -3939,15 +3818,13 @@ class PluginVersionCheckResult implements ResponseResult {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, isCompatible.hashCode);
-    hash = JenkinsSmiHash.combine(hash, name.hashCode);
-    hash = JenkinsSmiHash.combine(hash, version.hashCode);
-    hash = JenkinsSmiHash.combine(hash, contactInfo.hashCode);
-    hash = JenkinsSmiHash.combine(hash, interestingFiles.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        isCompatible.hashCode,
+        name.hashCode,
+        version.hashCode,
+        contactInfo.hashCode,
+        interestingFiles.hashCode,
+      );
 }
 
 /// PrioritizedSourceChange
@@ -4012,12 +3889,10 @@ class PrioritizedSourceChange implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, priority.hashCode);
-    hash = JenkinsSmiHash.combine(hash, change.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        priority.hashCode,
+        change.hashCode,
+      );
 }
 
 /// RefactoringFeedback
@@ -4053,10 +3928,7 @@ class RefactoringFeedback implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => 0;
 }
 
 /// RefactoringOptions
@@ -4091,10 +3963,7 @@ class RefactoringOptions implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => 0;
 }
 
 /// rename feedback
@@ -4184,14 +4053,12 @@ class RenameFeedback extends RefactoringFeedback {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, offset.hashCode);
-    hash = JenkinsSmiHash.combine(hash, length.hashCode);
-    hash = JenkinsSmiHash.combine(hash, elementKindName.hashCode);
-    hash = JenkinsSmiHash.combine(hash, oldName.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        offset.hashCode,
+        length.hashCode,
+        elementKindName.hashCode,
+        oldName.hashCode,
+      );
 }
 
 /// rename options
@@ -4249,11 +4116,7 @@ class RenameOptions extends RefactoringOptions {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, newName.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => newName.hashCode;
 }
 
 /// RequestError
@@ -4333,13 +4196,11 @@ class RequestError implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, code.hashCode);
-    hash = JenkinsSmiHash.combine(hash, message.hashCode);
-    hash = JenkinsSmiHash.combine(hash, stackTrace.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        code.hashCode,
+        message.hashCode,
+        stackTrace.hashCode,
+      );
 }
 
 /// RequestErrorCode
@@ -4483,12 +4344,10 @@ class WatchEvent implements HasToJson {
   }
 
   @override
-  int get hashCode {
-    var hash = 0;
-    hash = JenkinsSmiHash.combine(hash, type.hashCode);
-    hash = JenkinsSmiHash.combine(hash, path.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(
+        type.hashCode,
+        path.hashCode,
+      );
 }
 
 /// WatchEventType
diff --git a/pkg/analyzer_plugin/lib/src/utilities/change_builder/change_builder_core.dart b/pkg/analyzer_plugin/lib/src/utilities/change_builder/change_builder_core.dart
index f7e9777bd83..a9597f71f0c 100644
--- a/pkg/analyzer_plugin/lib/src/utilities/change_builder/change_builder_core.dart
+++ b/pkg/analyzer_plugin/lib/src/utilities/change_builder/change_builder_core.dart
@@ -10,7 +10,6 @@ import 'package:analyzer/dart/analysis/session.dart';
 import 'package:analyzer/exception/exception.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/generated/source.dart';
-import 'package:analyzer/src/generated/utilities_general.dart';
 import 'package:analyzer_plugin/protocol/protocol_common.dart';
 import 'package:analyzer_plugin/src/utilities/change_builder/change_builder_dart.dart';
 import 'package:analyzer_plugin/src/utilities/change_builder/change_builder_yaml.dart';
@@ -71,23 +70,14 @@ class ChangeBuilderImpl implements ChangeBuilder {
     // In addition, we should consider implementing our own hash function for
     // file edits because the `hashCode` defined for them might not be
     // sufficient to detect all changes to the list of edits.
-    var hash = 0;
-    for (var builder in _genericFileEditBuilders.values) {
-      if (builder.hasEdits) {
-        hash = JenkinsSmiHash.combine(hash, builder.fileEdit.hashCode);
-      }
-    }
-    for (var builder in _dartFileEditBuilders.values) {
-      if (builder.hasEdits) {
-        hash = JenkinsSmiHash.combine(hash, builder.fileEdit.hashCode);
-      }
-    }
-    for (var builder in _yamlFileEditBuilders.values) {
-      if (builder.hasEdits) {
-        hash = JenkinsSmiHash.combine(hash, builder.fileEdit.hashCode);
-      }
-    }
-    return JenkinsSmiHash.finish(hash);
+    return Object.hashAll([
+      for (var builder in _genericFileEditBuilders.values)
+        if (builder.hasEdits) builder.fileEdit,
+      for (var builder in _dartFileEditBuilders.values)
+        if (builder.hasEdits) builder.fileEdit,
+      for (var builder in _yamlFileEditBuilders.values)
+        if (builder.hasEdits) builder.fileEdit,
+    ]);
   }
 
   @override
diff --git a/pkg/analyzer_plugin/tool/spec/codegen_dart_protocol.dart b/pkg/analyzer_plugin/tool/spec/codegen_dart_protocol.dart
index 85fb45a7f54..5f3d9ca9c73 100644
--- a/pkg/analyzer_plugin/tool/spec/codegen_dart_protocol.dart
+++ b/pkg/analyzer_plugin/tool/spec/codegen_dart_protocol.dart
@@ -368,7 +368,6 @@ class CodegenProtocolVisitor extends DartCodegenVisitor with CodeGenerator {
   void emitImports() {
     writeln("import 'dart:convert' hide JsonDecoder;");
     writeln();
-    writeln("import 'package:analyzer/src/generated/utilities_general.dart';");
     writeln("import 'package:$packageName/protocol/protocol.dart';");
     writeln(
         "import 'package:$packageName/src/protocol/protocol_internal.dart';");
@@ -614,25 +613,39 @@ class CodegenProtocolVisitor extends DartCodegenVisitor with CodeGenerator {
   /// Emit the hashCode getter for an object class.
   void emitObjectHashCode(TypeObject? type, String className) {
     writeln('@override');
-    writeln('int get hashCode {');
+    writeln('int get hashCode => ');
     indent(() {
       if (type == null) {
-        writeln('return ${className.hashCode};');
+        writeln(' ${className.hashCode}');
       } else {
-        writeln('var hash = 0;');
-        for (var field in type.fields) {
-          String valueToCombine;
+        final items = type.fields.map((field) {
           if (field.value != null) {
-            valueToCombine = field.value.hashCode.toString();
+            return field.value.hashCode.toString();
           } else {
-            valueToCombine = '${field.name}.hashCode';
+            return '${field.name}.hashCode';
           }
-          writeln('hash = JenkinsSmiHash.combine(hash, $valueToCombine);');
+        }).toList();
+
+        if (items.isEmpty) {
+          writeln('0');
+        } else if (items.length == 1) {
+          writeln(items.single);
+        } else if (items.length <= 20) {
+          writeln('Object.hash(');
+          for (var field in items) {
+            writeln('$field,');
+          }
+          writeln(')');
+        } else {
+          writeln('Object.hashAll([');
+          for (var field in items) {
+            writeln('$field,');
+          }
+          writeln('])');
         }
-        writeln('return JenkinsSmiHash.finish(hash);');
       }
+      writeln(';');
     });
-    writeln('}');
   }
 
   /// If the class named [className] requires special constructors, emit them
diff --git a/pkg/analyzer_plugin/tool/spec/codegen_protocol_common.dart b/pkg/analyzer_plugin/tool/spec/codegen_protocol_common.dart
index a872b10d478..54062f6f99f 100644
--- a/pkg/analyzer_plugin/tool/spec/codegen_protocol_common.dart
+++ b/pkg/analyzer_plugin/tool/spec/codegen_protocol_common.dart
@@ -44,15 +44,11 @@ class CodegenCommonVisitor extends CodegenProtocolVisitor {
     writeln("import 'dart:convert' hide JsonDecoder;");
     writeln();
     if (forClient) {
-      writeln(
-          "import 'package:analysis_server_client/src/protocol/protocol_util.dart';");
       writeln(
           "import 'package:analysis_server_client/src/protocol/protocol_base.dart';");
       writeln(
           "import 'package:analysis_server_client/src/protocol/protocol_internal.dart';");
     } else {
-      writeln(
-          "import 'package:analyzer/src/generated/utilities_general.dart';");
       writeln("import 'package:$packageName/protocol/protocol.dart';");
       writeln(
           "import 'package:$packageName/src/protocol/protocol_internal.dart';");
diff --git a/pkg/nnbd_migration/lib/fix_reason_target.dart b/pkg/nnbd_migration/lib/fix_reason_target.dart
index 9f9c91ca2c9..c9c876bbf33 100644
--- a/pkg/nnbd_migration/lib/fix_reason_target.dart
+++ b/pkg/nnbd_migration/lib/fix_reason_target.dart
@@ -2,8 +2,6 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-import 'package:analyzer/src/generated/utilities_general.dart';
-
 /// Data structure representing a part of a type.  When a fix has multiple
 /// reasons (due to a complex type having different nullabilities at different
 /// locations), this data structure allows us to tell which part of the type
@@ -53,7 +51,7 @@ class _FixReasonTarget_NamedParameter extends _FixReasonTarget_Part {
       : super(inner);
 
   @override
-  int get hashCode => JenkinsSmiHash.hash3(2, inner.hashCode, name.hashCode);
+  int get hashCode => Object.hash(2, inner.hashCode, name.hashCode);
 
   @override
   bool operator ==(Object other) =>
@@ -82,7 +80,7 @@ class _FixReasonTarget_PositionalParameter extends _FixReasonTarget_Part {
       : super(inner);
 
   @override
-  int get hashCode => JenkinsSmiHash.hash3(1, inner.hashCode, index);
+  int get hashCode => Object.hash(1, inner.hashCode, index);
 
   @override
   bool operator ==(Object other) =>
@@ -100,7 +98,7 @@ class _FixReasonTarget_ReturnType extends _FixReasonTarget_Part {
   _FixReasonTarget_ReturnType(FixReasonTarget inner) : super(inner);
 
   @override
-  int get hashCode => JenkinsSmiHash.hash2(3, inner.hashCode);
+  int get hashCode => Object.hash(3, inner.hashCode);
 
   @override
   bool operator ==(Object other) =>
@@ -133,7 +131,7 @@ class _FixReasonTarget_TypeArgument extends _FixReasonTarget_Part {
       : super(inner);
 
   @override
-  int get hashCode => JenkinsSmiHash.hash3(5, inner.hashCode, index);
+  int get hashCode => Object.hash(5, inner.hashCode, index);
 
   @override
   bool operator ==(Object other) =>
@@ -164,7 +162,7 @@ class _FixReasonTarget_YieldedType extends _FixReasonTarget_Part {
   _FixReasonTarget_YieldedType(FixReasonTarget inner) : super(inner);
 
   @override
-  int get hashCode => JenkinsSmiHash.hash2(4, inner.hashCode);
+  int get hashCode => Object.hash(4, inner.hashCode);
 
   @override
   bool operator ==(Object other) =>
diff --git a/pkg/nnbd_migration/lib/nnbd_migration.dart b/pkg/nnbd_migration/lib/nnbd_migration.dart
index aaa17c7a58d..d184cb0e1cc 100644
--- a/pkg/nnbd_migration/lib/nnbd_migration.dart
+++ b/pkg/nnbd_migration/lib/nnbd_migration.dart
@@ -7,7 +7,6 @@ import 'dart:convert';
 import 'package:analyzer/dart/analysis/results.dart';
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/src/generated/source.dart';
-import 'package:analyzer/src/generated/utilities_general.dart';
 import 'package:analyzer_plugin/protocol/protocol_common.dart';
 import 'package:nnbd_migration/instrumentation.dart';
 import 'package:nnbd_migration/src/nullability_migration_impl.dart';
@@ -254,12 +253,7 @@ class NullabilityFixDescription {
       {required this.appliedMessage, required this.kind});
 
   @override
-  int get hashCode {
-    int hash = 0;
-    hash = JenkinsSmiHash.combine(hash, appliedMessage.hashCode);
-    hash = JenkinsSmiHash.combine(hash, kind.hashCode);
-    return JenkinsSmiHash.finish(hash);
-  }
+  int get hashCode => Object.hash(appliedMessage, kind);
 
   @override
   bool operator ==(Object other) =>
diff --git a/pkg/nnbd_migration/lib/src/front_end/migration_info.dart b/pkg/nnbd_migration/lib/src/front_end/migration_info.dart
index bef2c3adf4d..02ea5e16e18 100644
--- a/pkg/nnbd_migration/lib/src/front_end/migration_info.dart
+++ b/pkg/nnbd_migration/lib/src/front_end/migration_info.dart
@@ -2,7 +2,6 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-import 'package:analyzer/src/generated/utilities_general.dart';
 import 'package:analyzer_plugin/protocol/protocol_common.dart';
 import 'package:collection/collection.dart';
 import 'package:crypto/crypto.dart';
@@ -143,7 +142,7 @@ class NavigationTarget extends NavigationRegion {
       : super(offset, line, length);
 
   @override
-  int get hashCode => JenkinsSmiHash.hash3(filePath.hashCode, offset, length);
+  int get hashCode => Object.hash(filePath.hashCode, offset, length);
 
   @override
   bool operator ==(Object other) {
diff --git a/pkg/nnbd_migration/pubspec.yaml b/pkg/nnbd_migration/pubspec.yaml
index 18fffd339c4..6d8ac9d8577 100644
--- a/pkg/nnbd_migration/pubspec.yaml
+++ b/pkg/nnbd_migration/pubspec.yaml
@@ -4,7 +4,7 @@ name: nnbd_migration
 publish_to: none
 
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: '>=2.14.0 <3.0.0'
 
 dependencies:
   _fe_analyzer_shared:
diff --git a/pkg/telemetry/pubspec.yaml b/pkg/telemetry/pubspec.yaml
index 98d68d6ae80..b5b6b309f31 100644
--- a/pkg/telemetry/pubspec.yaml
+++ b/pkg/telemetry/pubspec.yaml
@@ -7,7 +7,7 @@ environment:
   sdk: '>=2.12.0 <3.0.0'
 
 dependencies:
-  http: ^0.12.0
+  http: ^0.13.0
   meta:
     path: ../meta
   path: ^1.4.0