private function convertAppServerToConfigOption($appServer)
    {
        $serverData = [
            'id'                => $appServer->getId(),
            'timestamp'         => $appServer->getTimestamp(),
            'ip'                => $appServer->getIp(),
            'lastFrontendUsage' => $appServer->getLastFrontendUsage(),
            'lastAdminUsage'    => $appServer->getLastAdminUsage()
        ];

        return serialize($serverData);
    }