Mirrors can not be used in Angular. See 
https://github.com/angular/angular.dart/blob/master/lib/angular_dynamic.dart
https://github.com/angular/angular.dart/blob/master/lib/angular_static.dart
and 
https://github.com/angular/angular.dart/blob/master/example/pubspec.yaml#L10

Basically mirrors get replaced with generated code using the transformers during the compilation phase.