/**
  * Action on post render event of mail templater.
  *
  * @param FilterPostRenderEvent $event The event
  */
 public function onPostRender(FilterPostRenderEvent $event)
 {
     foreach ($this->registry->getTemplateFilters() as $filter) {
         if (null !== ($mailRendered = $event->getMailRendered()) && $filter->supports($mailRendered)) {
             $filter->filter($mailRendered);
         }
     }
 }