Missed file.

Functions/MIME/zsh-mime-contexts

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+# Helper for zsh-mime-handler.
+#
+# Pass in a zstyle option, a suffix, which might include multiple parts
+# (e.g. pdf.gz), plus remaining zstyle arguments plus arguments to zstyle.
+# Try to match the style starting with the longest possible suffix.
+
+local context suffix option
+
+option=$1
+shift
+suffix=$1
+shift
+
+while true; do
+  context=":mime:.${suffix}:"
+  zstyle $option $context "$@" && return 0
+  if [[ $suffix = *.* ]]; then
+    suffix=${suffix#*.}
+  else
+    break
+  fi
+done
+
+return 1