tree 618e82e52f28ec1322cd1745822803619ad5be3d
parent f574efaf32230e6dee64ea13e716beae9a81ccda
author Todd Volkert <tvolkert@users.noreply.github.com> 1558369659 -0700
committer dart-luci-ci-builder <dart-luci-ci-builder@dart-ci.iam.gserviceaccount.com> 1558385202 -0700

Add assert that the root widget has been attached. (#32437)

https://dart.googlesource.com/external/github.com/flutter/flutter/+/069303d46fee7cc995c2ebcf253f7c5a87ab9533