question: public void sortMoviesInMovieSet ( MovieSet movieSet ) { synchronized ( root ) { MovieSetTreeNode node = ( MovieSetTreeNode ) nodeMap . get ( movieSet ) ; node . sort ( ) ; TreeModelEvent event = new TreeModelEvent ( this , node . getPath ( ) ) ; for ( TreeModelListener listener : listeners ) { listener . treeStructureChanged ( event ) ; } } }
target:  Sort movies in movie set.