CMS\Model\Language::cacheKey PHP Метод

    public static function cacheKey()
    {
        return HOST_HASH . md5('Language::findCachedLanguages');
    }

 public function deleteAction($id)
 {
     $model = Language::findFirst($id);
     if ($this->request->isPost()) {
         $this->cache->delete(Language::cacheKey());
         $model->delete();
         return $this->redirect($this->url->get() . 'cms/language');
     }
     $this->view->model = $model;
     $this->view->title = $this->helper->at('Removing language');
     $this->helper->title($this->view->title);
 }