Bolt\EventListener\SnippetListener::onResponse PHP Method

    public function onResponse(FilterResponseEvent $event)
    {
        if (!$event->isMasterRequest()) {
            return;
        }
        $request = $event->getRequest();
        if (Zone::isAsync($request)) {
            return;
        }
        $response = $event->getResponse();
        if (strpos($response->headers->get('Content-Type'), 'text/html') === false) {
            return;
        }
        if (!$event->getRequest()->isXmlHttpRequest()) {
            $this->addSnippets();
        }
        $this->render->postProcess($request, $response);
    }