public function overview()
    {
        /** @var PingService $pinger */
        $pinger = $this->app['extend.ping'];
        // Ping the extensions server to confirm connection
        $this->app['extend.online'] = $pinger->ping(true);

        try {
            return $this->render('@bolt/extend/extend.twig', $this->getRenderContext());
        } catch (\Exception $e) {
            return $this->getJsonException($e);
        }
    }