@Nullable
  @Override
  public Object getData(@NotNull String dataId) {
    if (CommonDataKeys.NAVIGATABLE.is(dataId)) {
      TreePath selection = getSelectionPath();
      Object o = selection == null ? null : selection.getLastPathComponent();
      return o instanceof Navigatable ? o : null;
    }
    else if (CopyValueAction.SELECTED_NODE.is(dataId)) {
      TreePath selection = getSelectionPath();
      return selection == null ? null : selection.getLastPathComponent();
    }
    return null;
  }
@Nullable
  @Override
  public Object getData(@NotNull String dataId)