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