public void deleteDropRS(){
  int old=_dropRS;
  _dropRS--;
  setDirtyAndFirePropertyChange("locationDeleteDropRS",Integer.toString(old),Integer.toString(_dropRS));
}

public void deleteDropRS ( ) { int old = _dropRS ; _dropRS -- ; setDirtyAndFirePropertyChange ( "locationDeleteDropRS" , Integer . toString ( old ) , Integer . toString ( _dropRS ) ) ; }
decrements the number of cars and or engines that will be dropped off by trains at this location .
