public function getItem()
    {
        if ($this->_item === null) {
            $this->_item = Yii::$app->menu->find()->where(['id' => $this->childOf])->with('hidden')->one();
            
            if (!$this->_item) {
                throw new Exception("Unable to find item with id " . $this->childOf);
            }
        }
        
        return $this->_item;
    }