/**
* The given object no longer wants to be notified of this event
*
* <p>The timer will shutdown if it is no longer being observed
*
* @param observer
*/
public static synchronized void unSubscribe(Observer observer) {
if (houseKeeper != null) {
houseKeeper.deleteObserver(observer);
if (houseKeeper.countObservers() == 0) {
stop();
}
}
}
