7a258fa43b
So, that we don't have to copy all class members for 99% cases when there are no augmentaitons. Change-Id: I5c225905a0460ce5162543553e207a2d4412ecb9 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/313082 Commit-Queue: Konstantin Shcheglov <scheglov@google.com> Reviewed-by: Samuel Rawlins <srawlins@google.com>