public TreePath getClosestPathForLocation(JTree tree, int x, int y) { return null; }
public TreePath getClosestPathForLocation(JTree tree, int x, int y) { return treeState.getPathClosestTo(x, y); }
  public TreePath getClosestPathForLocation(JTree tree,                                            int x, int y)  {    return null;  // FIXME: not implemented  }