e61aa1107d
Not actual migration, uses null asserts. Should be made safe as part of implementation in the server. Bug: https://github.com/dart-lang/sdk/issues/61701 Change-Id: I792ca9d05f25d3819d83a6119586ef937f00d31f Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/463464 Commit-Queue: Konstantin Shcheglov <scheglov@google.com> Reviewed-by: Samuel Rawlins <srawlins@google.com>