Paul Berry
bdff48309f
This annotation has been supported for some time, and is a valuable piece of the "extension types" feature. Change-Id: I6a6a6964f02564ff673cbdd6fca6b8bc69e5a06a Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/451160 Reviewed-by: Konstantin Shcheglov <scheglov@google.com> Commit-Queue: Paul Berry <paulberry@google.com> Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>