diff --git a/packages/flutter/lib/fix_data.yaml b/packages/flutter/lib/fix_data.yaml
index 75333d8fdbd..6cc57539e43 100644
--- a/packages/flutter/lib/fix_data.yaml
+++ b/packages/flutter/lib/fix_data.yaml
@@ -15,6 +15,204 @@
 version: 1
 transforms:
 
+  # Changes made in https://github.com/flutter/flutter/pull/64254
+  - title: "Migrate to 'removeRenderObjectChild'"
+    date: 2020-08-20
+    element:
+      uris: [ 'cupertino.dart', 'widgets.dart', 'material.dart' ]
+      method: 'removeChildRenderObject'
+      inClass: 'RenderObjectToWidgetElement'
+    changes:
+      - kind: 'rename'
+        newName: 'removeRenderObjectChild'
+
+  # Changes made in https://github.com/flutter/flutter/pull/64254
+  - title: "Migrate to 'moveRenderObjectChild'"
+    date: 2020-08-20
+    element:
+      uris: [ 'cupertino.dart', 'widgets.dart', 'material.dart' ]
+      method: 'moveChildRenderObject'
+      inClass: 'RenderObjectToWidgetElement'
+    changes:
+      - kind: 'rename'
+        newName: 'moveRenderObjectChild'
+
+  # Changes made in https://github.com/flutter/flutter/pull/64254
+  - title: "Migrate to 'insertRenderObjectChild'"
+    date: 2020-08-20
+    element:
+      uris: [ 'cupertino.dart', 'widgets.dart', 'material.dart' ]
+      method: 'insertChildRenderObject'
+      inClass: 'RenderObjectToWidgetElement'
+    changes:
+      - kind: 'rename'
+        newName: 'insertRenderObjectChild'
+
+  # Changes made in https://github.com/flutter/flutter/pull/64254
+  - title: "Migrate to 'removeRenderObjectChild'"
+    date: 2020-08-20
+    element:
+      uris: [ 'cupertino.dart', 'widgets.dart', 'material.dart' ]
+      method: 'removeChildRenderObject'
+      inClass: 'SliverMultiBoxAdaptorElement'
+    changes:
+      - kind: 'rename'
+        newName: 'removeRenderObjectChild'
+
+  # Changes made in https://github.com/flutter/flutter/pull/64254
+  - title: "Migrate to 'moveRenderObjectChild'"
+    date: 2020-08-20
+    element:
+      uris: [ 'cupertino.dart', 'widgets.dart', 'material.dart' ]
+      method: 'moveChildRenderObject'
+      inClass: 'SliverMultiBoxAdaptorElement'
+    changes:
+      - kind: 'rename'
+        newName: 'moveRenderObjectChild'
+
+  # Changes made in https://github.com/flutter/flutter/pull/64254
+  - title: "Migrate to 'insertRenderObjectChild'"
+    date: 2020-08-20
+    element:
+      uris: [ 'cupertino.dart', 'widgets.dart', 'material.dart' ]
+      method: 'insertChildRenderObject'
+      inClass: 'SliverMultiBoxAdaptorElement'
+    changes:
+      - kind: 'rename'
+        newName: 'insertRenderObjectChild'
+
+  # Changes made in https://github.com/flutter/flutter/pull/64254
+  - title: "Migrate to 'removeRenderObjectChild'"
+    date: 2020-08-20
+    element:
+      uris: [ 'cupertino.dart', 'widgets.dart', 'material.dart' ]
+      method: 'removeChildRenderObject'
+      inClass: 'SingleChildRenderObjectElement'
+    changes:
+      - kind: 'rename'
+        newName: 'removeRenderObjectChild'
+
+  # Changes made in https://github.com/flutter/flutter/pull/64254
+  - title: "Migrate to 'moveRenderObjectChild'"
+    date: 2020-08-20
+    element:
+      uris: [ 'cupertino.dart', 'widgets.dart', 'material.dart' ]
+      method: 'moveChildRenderObject'
+      inClass: 'SingleChildRenderObjectElement'
+    changes:
+      - kind: 'rename'
+        newName: 'moveRenderObjectChild'
+
+  # Changes made in https://github.com/flutter/flutter/pull/64254
+  - title: "Migrate to 'insertRenderObjectChild'"
+    date: 2020-08-20
+    element:
+      uris: [ 'cupertino.dart', 'widgets.dart', 'material.dart' ]
+      method: 'insertChildRenderObject'
+      inClass: 'SingleChildRenderObjectElement'
+    changes:
+      - kind: 'rename'
+        newName: 'insertRenderObjectChild'
+
+  # Changes made in https://github.com/flutter/flutter/pull/64254
+  - title: "Migrate to 'removeRenderObjectChild'"
+    date: 2020-08-20
+    element:
+      uris: [ 'cupertino.dart', 'widgets.dart', 'material.dart' ]
+      method: 'removeChildRenderObject'
+      inClass: 'MultiChildRenderObjectElement'
+    changes:
+      - kind: 'rename'
+        newName: 'removeRenderObjectChild'
+
+  # Changes made in https://github.com/flutter/flutter/pull/64254
+  - title: "Migrate to 'moveRenderObjectChild'"
+    date: 2020-08-20
+    element:
+      uris: [ 'cupertino.dart', 'widgets.dart', 'material.dart' ]
+      method: 'moveChildRenderObject'
+      inClass: 'MultiChildRenderObjectElement'
+    changes:
+      - kind: 'rename'
+        newName: 'moveRenderObjectChild'
+
+  # Changes made in https://github.com/flutter/flutter/pull/64254
+  - title: "Migrate to 'insertRenderObjectChild'"
+    date: 2020-08-20
+    element:
+      uris: [ 'cupertino.dart', 'widgets.dart', 'material.dart' ]
+      method: 'insertChildRenderObject'
+      inClass: 'MultiChildRenderObjectElement'
+    changes:
+      - kind: 'rename'
+        newName: 'insertRenderObjectChild'
+
+  # Changes made in https://github.com/flutter/flutter/pull/64254
+  - title: "Migrate to 'removeRenderObjectChild'"
+    date: 2020-08-20
+    element:
+      uris: [ 'cupertino.dart', 'widgets.dart', 'material.dart' ]
+      method: 'removeChildRenderObject'
+      inClass: 'ListWheelElement'
+    changes:
+      - kind: 'rename'
+        newName: 'removeRenderObjectChild'
+
+  # Changes made in https://github.com/flutter/flutter/pull/64254
+  - title: "Migrate to 'moveRenderObjectChild'"
+    date: 2020-08-20
+    element:
+      uris: [ 'cupertino.dart', 'widgets.dart', 'material.dart' ]
+      method: 'moveChildRenderObject'
+      inClass: 'ListWheelElement'
+    changes:
+      - kind: 'rename'
+        newName: 'moveRenderObjectChild'
+
+  # Changes made in https://github.com/flutter/flutter/pull/64254
+  - title: "Migrate to 'insertRenderObjectChild'"
+    date: 2020-08-20
+    element:
+      uris: [ 'cupertino.dart', 'widgets.dart', 'material.dart' ]
+      method: 'insertChildRenderObject'
+      inClass: 'ListWheelElement'
+    changes:
+      - kind: 'rename'
+        newName: 'insertRenderObjectChild'
+
+  # Changes made in https://github.com/flutter/flutter/pull/64254
+  - title: "Migrate to 'removeRenderObjectChild'"
+    date: 2020-08-20
+    element:
+      uris: [ 'cupertino.dart', 'widgets.dart', 'material.dart' ]
+      method: 'removeChildRenderObject'
+      inClass: 'LeafRenderObjectElement'
+    changes:
+      - kind: 'rename'
+        newName: 'removeRenderObjectChild'
+
+  # Changes made in https://github.com/flutter/flutter/pull/64254
+  - title: "Migrate to 'moveRenderObjectChild'"
+    date: 2020-08-20
+    element:
+      uris: [ 'cupertino.dart', 'widgets.dart', 'material.dart' ]
+      method: 'moveChildRenderObject'
+      inClass: 'LeafRenderObjectElement'
+    changes:
+      - kind: 'rename'
+        newName: 'moveRenderObjectChild'
+
+  # Changes made in https://github.com/flutter/flutter/pull/64254
+  - title: "Migrate to 'insertRenderObjectChild'"
+    date: 2020-08-20
+    element:
+      uris: [ 'cupertino.dart', 'widgets.dart', 'material.dart' ]
+      method: 'insertChildRenderObject'
+      inClass: 'LeafRenderObjectElement'
+    changes:
+      - kind: 'rename'
+        newName: 'insertRenderObjectChild'
+
   # Changes made in https://github.com/flutter/flutter/pull/60320
   - title: "Migrate to 'viewId'"
     date: 2020-07-05
diff --git a/packages/flutter/test_fixes/cupertino.dart b/packages/flutter/test_fixes/cupertino.dart
index 4c456a17f2b..a5d7938d95c 100644
--- a/packages/flutter/test_fixes/cupertino.dart
+++ b/packages/flutter/test_fixes/cupertino.dart
@@ -7,6 +7,9 @@ import 'package:flutter/cupertino.dart';
 void main() {
   // Generic reference variables.
   BuildContext context;
+  RenderObjectWidget renderObjectWidget;
+  RenderObject renderObject;
+  Object object;
 
   // Change made in https://github.com/flutter/flutter/pull/41859
   const CupertinoTextThemeData themeData = CupertinoTextThemeData(brightness: Brightness.dark);
@@ -139,4 +142,30 @@ void main() {
   longPressDraggable = LongPressDraggable(dragAnchor: DragAnchor.child);
   longPressDraggable = LongPressDraggable(dragAnchor: DragAnchor.pointer);
   longPressDraggable.dragAnchor;
+
+  // Changes made in https://github.com/flutter/flutter/pull/64254
+  final LeafRenderObjectElement leafElement = LeafRenderObjectElement();
+  leafElement.insertChildRenderObject(renderObject, object);
+  leafElement.moveChildRenderObject(renderObject, object);
+  leafElement.removeChildRenderObject(renderObject);
+  final ListWheelElement listWheelElement = ListWheelElement();
+  listWheelElement.insertChildRenderObject(renderObject, object);
+  listWheelElement.moveChildRenderObject(renderObject, object);
+  listWheelElement.removeChildRenderObject(renderObject);
+  final MultiChildRenderObjectElement multiChildRenderObjectElement = MultiChildRenderObjectElement();
+  multiChildRenderObjectElement.insertChildRenderObject(renderObject, object);
+  multiChildRenderObjectElement.moveChildRenderObject(renderObject, object);
+  multiChildRenderObjectElement.removeChildRenderObject(renderObject);
+  final SingleChildRenderObjectElement singleChildRenderObjectElement = SingleChildRenderObjectElement();
+  singleChildRenderObjectElement.insertChildRenderObject(renderObject, object);
+  singleChildRenderObjectElement.moveChildRenderObject(renderObject, object);
+  singleChildRenderObjectElement.removeChildRenderObject(renderObject);
+  final SliverMultiBoxAdaptorElement sliverMultiBoxAdaptorElement = SliverMultiBoxAdaptorElement();
+  sliverMultiBoxAdaptorElement.insertChildRenderObject(renderObject, object);
+  sliverMultiBoxAdaptorElement.moveChildRenderObject(renderObject, object);
+  sliverMultiBoxAdaptorElement.removeChildRenderObject(renderObject);
+  final RenderObjectToWidgetElement renderObjectToWidgetElement = RenderObjectToWidgetElement(widget);
+  renderObjectToWidgetElement.insertChildRenderObject(renderObject, object);
+  renderObjectToWidgetElement.moveChildRenderObject(renderObject, object);
+  renderObjectToWidgetElement.removeChildRenderObject(renderObject);
 }
diff --git a/packages/flutter/test_fixes/cupertino.dart.expect b/packages/flutter/test_fixes/cupertino.dart.expect
index 6b99c937295..65d8b971764 100644
--- a/packages/flutter/test_fixes/cupertino.dart.expect
+++ b/packages/flutter/test_fixes/cupertino.dart.expect
@@ -7,6 +7,9 @@ import 'package:flutter/cupertino.dart';
 void main() {
   // Generic reference variables.
   BuildContext context;
+  RenderObjectWidget renderObjectWidget;
+  RenderObject renderObject;
+  Object object;
 
   // Change made in https://github.com/flutter/flutter/pull/41859
   const CupertinoTextThemeData themeData = CupertinoTextThemeData();
@@ -139,4 +142,30 @@ void main() {
   longPressDraggable = LongPressDraggable(dragAnchorStrategy: childDragAnchorStrategy);
   longPressDraggable = LongPressDraggable(dragAnchorStrategy: pointerDragAnchorStrategy);
   longPressDraggable.dragAnchorStrategy;
+
+  // Changes made in https://github.com/flutter/flutter/pull/64254
+  final LeafRenderObjectElement leafElement = LeafRenderObjectElement();
+  leafElement.insertRenderObjectChild(renderObject, object);
+  leafElement.moveRenderObjectChild(renderObject, object);
+  leafElement.removeRenderObjectChild(renderObject);
+  final ListWheelElement listWheelElement = ListWheelElement();
+  listWheelElement.insertRenderObjectChild(renderObject, object);
+  listWheelElement.moveRenderObjectChild(renderObject, object);
+  listWheelElement.removeRenderObjectChild(renderObject);
+  final MultiChildRenderObjectElement multiChildRenderObjectElement = MultiChildRenderObjectElement();
+  multiChildRenderObjectElement.insertRenderObjectChild(renderObject, object);
+  multiChildRenderObjectElement.moveRenderObjectChild(renderObject, object);
+  multiChildRenderObjectElement.removeRenderObjectChild(renderObject);
+  final SingleChildRenderObjectElement singleChildRenderObjectElement = SingleChildRenderObjectElement();
+  singleChildRenderObjectElement.insertRenderObjectChild(renderObject, object);
+  singleChildRenderObjectElement.moveRenderObjectChild(renderObject, object);
+  singleChildRenderObjectElement.removeRenderObjectChild(renderObject);
+  final SliverMultiBoxAdaptorElement sliverMultiBoxAdaptorElement = SliverMultiBoxAdaptorElement();
+  sliverMultiBoxAdaptorElement.insertRenderObjectChild(renderObject, object);
+  sliverMultiBoxAdaptorElement.moveRenderObjectChild(renderObject, object);
+  sliverMultiBoxAdaptorElement.removeRenderObjectChild(renderObject);
+  final RenderObjectToWidgetElement renderObjectToWidgetElement = RenderObjectToWidgetElement(widget);
+  renderObjectToWidgetElement.insertRenderObjectChild(renderObject, object);
+  renderObjectToWidgetElement.moveRenderObjectChild(renderObject, object);
+  renderObjectToWidgetElement.removeRenderObjectChild(renderObject);
 }
diff --git a/packages/flutter/test_fixes/material.dart b/packages/flutter/test_fixes/material.dart
index d922a292e7a..e13f66287ea 100644
--- a/packages/flutter/test_fixes/material.dart
+++ b/packages/flutter/test_fixes/material.dart
@@ -7,6 +7,9 @@ import 'package:flutter/material.dart';
 void main() {
   // Generic reference variables.
   BuildContext context;
+  RenderObjectWidget renderObjectWidget;
+  RenderObject renderObject;
+  Object object;
 
   // Changes made in https://github.com/flutter/flutter/pull/26259
   const Scaffold scaffold = Scaffold(resizeToAvoidBottomPadding: true);
@@ -301,4 +304,30 @@ void main() {
   longPressDraggable = LongPressDraggable(dragAnchor: DragAnchor.child);
   longPressDraggable = LongPressDraggable(dragAnchor: DragAnchor.pointer);
   longPressDraggable.dragAnchor;
+
+  // Changes made in https://github.com/flutter/flutter/pull/64254
+  final LeafRenderObjectElement leafElement = LeafRenderObjectElement();
+  leafElement.insertChildRenderObject(renderObject, object);
+  leafElement.moveChildRenderObject(renderObject, object);
+  leafElement.removeChildRenderObject(renderObject);
+  final ListWheelElement listWheelElement = ListWheelElement();
+  listWheelElement.insertChildRenderObject(renderObject, object);
+  listWheelElement.moveChildRenderObject(renderObject, object);
+  listWheelElement.removeChildRenderObject(renderObject);
+  final MultiChildRenderObjectElement multiChildRenderObjectElement = MultiChildRenderObjectElement();
+  multiChildRenderObjectElement.insertChildRenderObject(renderObject, object);
+  multiChildRenderObjectElement.moveChildRenderObject(renderObject, object);
+  multiChildRenderObjectElement.removeChildRenderObject(renderObject);
+  final SingleChildRenderObjectElement singleChildRenderObjectElement = SingleChildRenderObjectElement();
+  singleChildRenderObjectElement.insertChildRenderObject(renderObject, object);
+  singleChildRenderObjectElement.moveChildRenderObject(renderObject, object);
+  singleChildRenderObjectElement.removeChildRenderObject(renderObject);
+  final SliverMultiBoxAdaptorElement sliverMultiBoxAdaptorElement = SliverMultiBoxAdaptorElement();
+  sliverMultiBoxAdaptorElement.insertChildRenderObject(renderObject, object);
+  sliverMultiBoxAdaptorElement.moveChildRenderObject(renderObject, object);
+  sliverMultiBoxAdaptorElement.removeChildRenderObject(renderObject);
+  final RenderObjectToWidgetElement renderObjectToWidgetElement = RenderObjectToWidgetElement(widget);
+  renderObjectToWidgetElement.insertChildRenderObject(renderObject, object);
+  renderObjectToWidgetElement.moveChildRenderObject(renderObject, object);
+  renderObjectToWidgetElement.removeChildRenderObject(renderObject);
 }
diff --git a/packages/flutter/test_fixes/material.dart.expect b/packages/flutter/test_fixes/material.dart.expect
index b6fc6939485..79a0665b904 100644
--- a/packages/flutter/test_fixes/material.dart.expect
+++ b/packages/flutter/test_fixes/material.dart.expect
@@ -7,6 +7,9 @@ import 'package:flutter/material.dart';
 void main() {
   // Generic reference variables.
   BuildContext context;
+  RenderObjectWidget renderObjectWidget;
+  RenderObject renderObject;
+  Object object;
 
   // Changes made in https://github.com/flutter/flutter/pull/26259
   const Scaffold scaffold = Scaffold(resizeToAvoidBottomInset: true);
@@ -273,4 +276,30 @@ void main() {
   longPressDraggable = LongPressDraggable(dragAnchorStrategy: childDragAnchorStrategy);
   longPressDraggable = LongPressDraggable(dragAnchorStrategy: pointerDragAnchorStrategy);
   longPressDraggable.dragAnchorStrategy;
+
+  // Changes made in https://github.com/flutter/flutter/pull/64254
+  final LeafRenderObjectElement leafElement = LeafRenderObjectElement();
+  leafElement.insertRenderObjectChild(renderObject, object);
+  leafElement.moveRenderObjectChild(renderObject, object);
+  leafElement.removeRenderObjectChild(renderObject);
+  final ListWheelElement listWheelElement = ListWheelElement();
+  listWheelElement.insertRenderObjectChild(renderObject, object);
+  listWheelElement.moveRenderObjectChild(renderObject, object);
+  listWheelElement.removeRenderObjectChild(renderObject);
+  final MultiChildRenderObjectElement multiChildRenderObjectElement = MultiChildRenderObjectElement();
+  multiChildRenderObjectElement.insertRenderObjectChild(renderObject, object);
+  multiChildRenderObjectElement.moveRenderObjectChild(renderObject, object);
+  multiChildRenderObjectElement.removeRenderObjectChild(renderObject);
+  final SingleChildRenderObjectElement singleChildRenderObjectElement = SingleChildRenderObjectElement();
+  singleChildRenderObjectElement.insertRenderObjectChild(renderObject, object);
+  singleChildRenderObjectElement.moveRenderObjectChild(renderObject, object);
+  singleChildRenderObjectElement.removeRenderObjectChild(renderObject);
+  final SliverMultiBoxAdaptorElement sliverMultiBoxAdaptorElement = SliverMultiBoxAdaptorElement();
+  sliverMultiBoxAdaptorElement.insertRenderObjectChild(renderObject, object);
+  sliverMultiBoxAdaptorElement.moveRenderObjectChild(renderObject, object);
+  sliverMultiBoxAdaptorElement.removeRenderObjectChild(renderObject);
+  final RenderObjectToWidgetElement renderObjectToWidgetElement = RenderObjectToWidgetElement(widget);
+  renderObjectToWidgetElement.insertRenderObjectChild(renderObject, object);
+  renderObjectToWidgetElement.moveRenderObjectChild(renderObject, object);
+  renderObjectToWidgetElement.removeRenderObjectChild(renderObject);
 }
diff --git a/packages/flutter/test_fixes/widgets.dart b/packages/flutter/test_fixes/widgets.dart
index 21c95359975..0fd6ddc7dec 100644
--- a/packages/flutter/test_fixes/widgets.dart
+++ b/packages/flutter/test_fixes/widgets.dart
@@ -7,6 +7,9 @@ import 'package:flutter/widgets.dart';
 void main() {
   // Generic reference variables.
   BuildContext context;
+  RenderObjectWidget renderObjectWidget;
+  RenderObject renderObject;
+  Object object;
 
   // Changes made in https://github.com/flutter/flutter/pull/44189
   const Element element = Element(myWidget);
@@ -107,4 +110,30 @@ void main() {
   longPressDraggable = LongPressDraggable(dragAnchor: DragAnchor.child);
   longPressDraggable = LongPressDraggable(dragAnchor: DragAnchor.pointer);
   longPressDraggable.dragAnchor;
+
+  // Changes made in https://github.com/flutter/flutter/pull/64254
+  final LeafRenderObjectElement leafElement = LeafRenderObjectElement();
+  leafElement.insertChildRenderObject(renderObject, object);
+  leafElement.moveChildRenderObject(renderObject, object);
+  leafElement.removeChildRenderObject(renderObject);
+  final ListWheelElement listWheelElement = ListWheelElement();
+  listWheelElement.insertChildRenderObject(renderObject, object);
+  listWheelElement.moveChildRenderObject(renderObject, object);
+  listWheelElement.removeChildRenderObject(renderObject);
+  final MultiChildRenderObjectElement multiChildRenderObjectElement = MultiChildRenderObjectElement();
+  multiChildRenderObjectElement.insertChildRenderObject(renderObject, object);
+  multiChildRenderObjectElement.moveChildRenderObject(renderObject, object);
+  multiChildRenderObjectElement.removeChildRenderObject(renderObject);
+  final SingleChildRenderObjectElement singleChildRenderObjectElement = SingleChildRenderObjectElement();
+  singleChildRenderObjectElement.insertChildRenderObject(renderObject, object);
+  singleChildRenderObjectElement.moveChildRenderObject(renderObject, object);
+  singleChildRenderObjectElement.removeChildRenderObject(renderObject);
+  final SliverMultiBoxAdaptorElement sliverMultiBoxAdaptorElement = SliverMultiBoxAdaptorElement();
+  sliverMultiBoxAdaptorElement.insertChildRenderObject(renderObject, object);
+  sliverMultiBoxAdaptorElement.moveChildRenderObject(renderObject, object);
+  sliverMultiBoxAdaptorElement.removeChildRenderObject(renderObject);
+  final RenderObjectToWidgetElement renderObjectToWidgetElement = RenderObjectToWidgetElement(widget);
+  renderObjectToWidgetElement.insertChildRenderObject(renderObject, object);
+  renderObjectToWidgetElement.moveChildRenderObject(renderObject, object);
+  renderObjectToWidgetElement.removeChildRenderObject(renderObject);
 }
diff --git a/packages/flutter/test_fixes/widgets.dart.expect b/packages/flutter/test_fixes/widgets.dart.expect
index 854d81d2c48..b2b3868397c 100644
--- a/packages/flutter/test_fixes/widgets.dart.expect
+++ b/packages/flutter/test_fixes/widgets.dart.expect
@@ -7,6 +7,9 @@ import 'package:flutter/widgets.dart';
 void main() {
   // Generic reference variables.
   BuildContext context;
+  RenderObjectWidget renderObjectWidget;
+  RenderObject renderObject;
+  Object object;
 
   // Changes made in https://github.com/flutter/flutter/pull/44189
   const Element element = Element(myWidget);
@@ -107,4 +110,30 @@ void main() {
   longPressDraggable = LongPressDraggable(dragAnchorStrategy: childDragAnchorStrategy);
   longPressDraggable = LongPressDraggable(dragAnchorStrategy: pointerDragAnchorStrategy);
   longPressDraggable.dragAnchorStrategy;
+
+  // Changes made in https://github.com/flutter/flutter/pull/64254
+  final LeafRenderObjectElement leafElement = LeafRenderObjectElement();
+  leafElement.insertRenderObjectChild(renderObject, object);
+  leafElement.moveRenderObjectChild(renderObject, object);
+  leafElement.removeRenderObjectChild(renderObject);
+  final ListWheelElement listWheelElement = ListWheelElement();
+  listWheelElement.insertRenderObjectChild(renderObject, object);
+  listWheelElement.moveRenderObjectChild(renderObject, object);
+  listWheelElement.removeRenderObjectChild(renderObject);
+  final MultiChildRenderObjectElement multiChildRenderObjectElement = MultiChildRenderObjectElement();
+  multiChildRenderObjectElement.insertRenderObjectChild(renderObject, object);
+  multiChildRenderObjectElement.moveRenderObjectChild(renderObject, object);
+  multiChildRenderObjectElement.removeRenderObjectChild(renderObject);
+  final SingleChildRenderObjectElement singleChildRenderObjectElement = SingleChildRenderObjectElement();
+  singleChildRenderObjectElement.insertRenderObjectChild(renderObject, object);
+  singleChildRenderObjectElement.moveRenderObjectChild(renderObject, object);
+  singleChildRenderObjectElement.removeRenderObjectChild(renderObject);
+  final SliverMultiBoxAdaptorElement sliverMultiBoxAdaptorElement = SliverMultiBoxAdaptorElement();
+  sliverMultiBoxAdaptorElement.insertRenderObjectChild(renderObject, object);
+  sliverMultiBoxAdaptorElement.moveRenderObjectChild(renderObject, object);
+  sliverMultiBoxAdaptorElement.removeRenderObjectChild(renderObject);
+  final RenderObjectToWidgetElement renderObjectToWidgetElement = RenderObjectToWidgetElement(widget);
+  renderObjectToWidgetElement.insertRenderObjectChild(renderObject, object);
+  renderObjectToWidgetElement.moveRenderObjectChild(renderObject, object);
+  renderObjectToWidgetElement.removeRenderObjectChild(renderObject);
 }