@NotNull
  public ActionCallback selectCB(Object element, VirtualFile file, boolean requestFocus) {
    if (file != null) {
      if (myAsyncSupport != null) {
        return myAsyncSupport.select(myTree, element, file);
      }
    }
    return ActionCallback.DONE;
  }
@NotNull
  public ActionCallback selectCB(Object element, VirtualFile file, boolean requestFocus)