code: public function listenToRenderer()
      {
          if ($this->ListenersUnaware) {
              // set a listener at the end of the Rendering-Process
              // to announce what files have been inserted
              $this->ListenersUnaware = false;
              $view = $this->serviceManager->get('View');
              $viewEvents = $view->getEventManager();
              // rendering ist over
              // get the attached Files very early
              // before any other postprocessing has started
              $viewEvents->attach(ViewEvent::EVENT_RESPONSE, array($this, 'anounceAttachedFiles'), 1000);
          }
      }
docs: hook into the rendering-process to provide a summary of all included files