ec1ddcdb83
This improves the missing class, mixin, and extension method body error messages and lays the groundwork for improving other missing body error messages such as switch statement, finally clause, and others. Change-Id: I0a4d1338fe91eee3cfe7d61652e168df1302d212 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/103570 Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>