private boolean isUpDownKey(@NotNull AnActionEvent e) {
      final InputEvent event = e.getInputEvent();
      if (!(event instanceof KeyEvent)) {
        return false;
      }
      final KeyStroke keyStroke = KeyStroke.getKeyStrokeForEvent((KeyEvent)event);
      return myUpDownKeystrokes.contains(keyStroke);
    }
private boolean isUpDownKey(@NotNull AnActionEvent e)