super.installUI(c);
  public void installUI(JComponent c)  {    tree = (JTree) c;    treeModel = tree.getModel();    prepareForUIInstall();    super.installUI(c);    installDefaults();    installComponents();    installKeyboardActions();    installListeners();    setCellEditor(createDefaultCellEditor());    createdCellEditor = true;    isEditing = false;        setModel(tree.getModel());    treeSelectionModel = tree.getSelectionModel();    setRootVisible(tree.isRootVisible());    treeState.setRootVisible(tree.isRootVisible());    updateExpandedDescendants(new TreePath(new Object[] { treeModel.getRoot() }));    completeUIInstall();  }