createTreeCellEditor();
realEditor = createTreeCellEditor();
  public Component getTreeCellEditorComponent(JTree tree, Object value,                                              boolean isSelected, boolean expanded,                                              boolean leaf, int row)  {    if (realEditor == null)      createTreeCellEditor();    return realEditor.getTreeCellEditorComponent(tree, value, isSelected,                                                        expanded, leaf, row);  }