code: public function buildAndForwardEvent(Event $event)
      {
          if (!$event instanceof PageViewEvent) {
              return;
          }
  
          $page = $event->getPage();
          $admin = $this->sonata->getAdminByClass(get_class($page));
  
          if ($admin === null) {
              $admin = $this->sonata->getAdminByClass(get_parent_class($page));
          }
  
          if ($page->getId() && $admin !== null) {
              $title = $event->getPage()->getTitle();
              /** @var \Zicht\Bundle\PageBundle\Event\PageViewEvent $event */
              /** @var \Zicht\Bundle\PageBundle\Event\PageViewEvent $e */
              $this->eventDispatcher->dispatch(
                  AdminEvents::MENU_EVENT,
                  new MenuEvent(
                      $admin->generateObjectUrl('edit', $event->getPage()),
                      sprintf(
                          'Beheer pagina "%s"',
                          strlen($title) > 20 ? substr($title, 0, 20) . '...' : $title
                      )
                  )
              );
          }
      }
docs: Build the relevant event and forward it.
  
  @param \Symfony\Component\EventDispatcher\Event $event
  @return null|void