question: @ SuppressWarnings ( "unchecked" ) protected void notify ( LocoNetSlot s ) { Vector < SlotListener > v ; synchronized ( this ) { v = ( Vector < SlotListener > ) slotListeners . clone ( ) ; } if ( log . isDebugEnabled ( ) ) { log . debug ( "notify " + v . size ( ) + " SlotListeners about slot " + s . getSlot ( ) ) ; } int cnt = v . size ( ) ; for ( int i = 0 ; i < cnt ; i ++ ) { SlotListener client = v . elementAt ( i ) ; client . notifyChangedSlot ( s ) ; } }
target:  Trigger the notification of all SlotListeners.