protected function assignServers(\GearmanClient $gearmanClient)
    {
        $servers = $this->defaultServers;

        if (!empty($this->servers)) {

            $servers = $this->servers;
        }

        /**
         * We include each server into gearman client
         */
        foreach ($servers as $server) {

            $gearmanClient->addServer($server['host'], $server['port']);
        }

        return $this;
    }