https://github.com/mhevery/angular.dart/commit/8368ef9f4703fa6efa3a51790bcd4956a2278f2a and https://github.com/angular/angular.dart/pull/700 provide more details regarding this, this should be ported in.
mhevery/angular.dart@8368ef9 and dart-archive/angular.dart#700 provide more details regarding this, this should be ported in.