anchor.diff:  @Injectable()
   class AppViewUtils {
     final String _appId;
  -  EventManager eventManager;
  +  final EventManager eventManager;
  +  final SanitizationService sanitizer;
     static int _nextCompTypeId = 0;
   
     /// Whether change detection should throw an exception when a change is
  
positive.code:   ///
    /// Latency sensitive! Used by checkBinding during change detection.
    static bool get throwOnChanges => isDevMode && _throwOnChanges;
    static set throwOnChanges(bool value) => _throwOnChanges = value;
    static bool _throwOnChanges = false;
    static int _throwOnChangesCounter = 0;
  
    SanitizationService sanitizer;
  
    AppViewUtils(@Inject(APP_ID) this._appId, this.sanitizer, this.eventManager);
  
  
negative.code:   /// stable.
    static void enterThrowOnChanges() {
      _throwOnChangesCounter++;
      _throwOnChanges = true;
    }
  
    /// Exits change detection check mode.
  