anchor.diff:  
       test('should trigger in response to an action', () {
         store.triggerOnAction(action);
  -      store.listen(expectAsync((Store listenedStore) {
  +      store.listen(expectAsync1((Store listenedStore) {
           expect(listenedStore, equals(store));
         }));
         action();
  
positive.code:         afterTimer = true;
        }
        store.triggerOnAction(action, asyncCallback);
        store.listen(expectAsync((Store listenedStore) {
          expect(listenedStore, equals(store));
          expect(afterTimer, isTrue);
        }));
  
negative.code:         wasTriggered = true;
        }
        store.triggerOnAction(action, onAction);
        store.listen(expectAsync1((Store listenedStore) {
          expect(listenedStore, equals(store));
          expect(wasTriggered, isTrue);
        }));
  