code: protected void fireTreeStructureChanged(Object source, Object[] path,
          int[] childIndices, Object[] children)
      {
          for (TreeModelListener listener : treeModelListeners)
          {
              listener.treeStructureChanged(
                  new TreeModelEvent(source, path, childIndices, children));
          }
      }
docs: Fires a treeStructureChanged event
  
  @param source The source
  @param path The tree paths
  @param childIndices The child indices
  @param children The children