@Override public String toString(){
  if (getUserObject() instanceof MovieSet) {
    MovieSet movieSet=(MovieSet)getUserObject();
    return movieSet.getTitle();
  }
  return super.toString();
}

@ Override public String toString ( ) { if ( getUserObject ( ) instanceof MovieSet ) { MovieSet movieSet = ( MovieSet ) getUserObject ( ) ; return movieSet . getTitle ( ) ; } return super . toString ( ) ; }
provides the right name of the node for display .
