ed49d04e2e
This doesn't change any functionality, it just extracts some code from the editableArguments handler into a mixin because the editArgument handler will want to reuse some of this logic to locate the argument/parameter and ensure it is allowed to be edited. Change-Id: Ibe9f1350c977b470847cebe2ecf7a7bec5256000 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/398440 Reviewed-by: Elliott Brooks <elliottbrooks@google.com> Reviewed-by: Brian Wilkerson <brianwilkerson@google.com> Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>