private static ShortcutSet getShortcutUpDown(boolean isUp) {
    AnAction action = ActionManager.getInstance().getActionOrStub(isUp ?
                                                                  IdeActions.ACTION_EDITOR_MOVE_CARET_UP :
                                                                  IdeActions.ACTION_EDITOR_MOVE_CARET_DOWN);
    if (action != null) {
      return action.getShortcutSet();
    }
    return new CustomShortcutSet(KeyStroke.getKeyStroke(isUp ? KeyEvent.VK_UP : KeyEvent.VK_DOWN, 0));
  }
private static ShortcutSet getShortcutUpDown(boolean isUp)