`addMethodInsert` and `addCaseClauseAtEndInsert` are only used by code
which combines them with DartEditBuilder, so the change is pretty
simple. A few utilities are needed in DartEditBuilder, which are also
not complicated, such as a utility for getting the existing indentation
string on a line. Using this utility in the shared code should improve
someo of the existing fixes and assists, which didn't use it before.
The same goes for looking at whether left and right brackets are
synthetic. So this change comes with a few minor improvements.
Change-Id: I5b235021ac234b4a50b09dca6d14a28b3f163e5e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/360980
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Commit-Queue: Samuel Rawlins <srawlins@google.com>
Sam Rawlins
51d7b8477d