public function renderContainer($name, $page = null, BlockInterface $parentContainer = null)
 {
     try {
         $response = parent::renderContainer($name, $page, $parentContainer);
         return $response;
     } catch (\RunTimeException $e) {
         // silently fail error message
         return '';
     }
 }
 /**
  * @param \Sonata\PageBundle\Model\PageInterface $page
  * @return array
  */
 protected function getRenderPageParams(PageInterface $page)
 {
     return array_merge(parent::getRenderPageParams($page), array('page_admin' => $this->getPageAdmin(), 'block_admin' => $this->getBlockAdmin()));
 }