code: public function getController(Request $request)
      {
          if ($request->attributes->has('_controller')) {
              $fragmentConfig = $this->registry->get($request->attributes->get('_controller'));
  
              if (null !== $fragmentConfig) {
                  $request->attributes->set('_controller', $fragmentConfig->getController());
              }
          }
  
          return $this->resolver->getController($request);
      }
docs: {@inheritdoc}