tree f08a10859ba019c27be1198bbd4f9919fed57dcf
parent c0e827eadc3fa4eb928f21e0ef54bc9a96d598c0
author liyuqian <liyuqian@google.com> 1558393115 -0700
committer dart-luci-ci-builder <dart-luci-ci-builder@dart-ci.iam.gserviceaccount.com> 1558394105 -0700

Correct the return type of addRetained (#9025)

It should return void as SceneBuilder::addRetained is returning void.
Thanks yjbanov@ for finding this typo!
https://dart.googlesource.com/external/github.com/flutter/engine/+/3d2e9b24aa712ba60206e7ac392a709df0939635