public <T> ObservableTransformer<? super T, T> transform(Observer<? super T> observer,
          String observableTag) {
    return group.transform(observer, observableTag);
  }
public <T> ObservableTransformer<? super T, T> transform(Observer<? super T> observer,
          String observableTag) {
    return group.transform(observer, observableTag);
  }
public < T > ObservableTransformer < ? super T , T > transform ( Observer < ? super T > observer , String observableTag ) { return group . transform ( observer , observableTag ) ; }
Calls {@link ObservableGroup#transform(Observer, String)}  for the group managed by
this instance.
Calls {