question: public void deregister ( Route route ) { if ( route == null ) { return ; } route . dispose ( ) ; Integer oldSize = Integer . valueOf ( _routeHashTable . size ( ) ) ; _routeHashTable . remove ( route . getId ( ) ) ; setDirtyAndFirePropertyChange ( LISTLENGTH_CHANGED_PROPERTY , oldSize , Integer . valueOf ( _routeHashTable . size ( ) ) ) ; }
target:  Forget a NamedBean Object created outside the manager.