public void cancelAndRemove(Observer<?> observer, String observableTag) {
    cancelAndRemove(Utils.getObserverTag(observer), observableTag);
  }
public void cancelAndRemove(Observer<?> observer, String observableTag) {
    cancelAndRemove(Utils.getObserverTag(observer), observableTag);
  }
public void cancelAndRemove ( Observer < ? > observer , String observableTag ) { cancelAndRemove ( Utils . getObserverTag ( observer ) , observableTag ) ; }
Removes the {@link Observable} identified by {@code observableTag} for the given
{@link Observer} and cancels it subscription.
No more events will be delivered to its subscriber.
<p>If no Observable is found for the provided {@code observableTag}, nothing happens.
Removes the {