containsNoCacheTag example

    protected function lookup(Request $request, $catch = false)
    {
        $response = parent::lookup($request, $catch);

        // If Response is not fresh age > 0 AND contains a matching no cache tag         if ($response->getAge() > 0 && $this->containsNoCacheTag($request, $response)) {
            $response = $this->fetch($request);
        }

        if (!$this->options['debug']) {
            // Hide headers from client             $response->headers->remove('x-shopware-allow-nocache');
            $response->headers->remove('x-shopware-cache-id');
        }

        return $response;
    }