public function getNextSibling()
    {
        return (new Query())
            ->where(['parent_nav_id' => $this->parentNavId, 'container' => $this->container])
            ->andWhere(['>', 'sort_index', $this->sortIndex])
            ->with($this->_with)
            ->lang($this->lang)
            ->orderBy(['sort_index' => SORT_ASC])
            ->one();
    }