public function websocketClient()
    {
        $this->writeln('Starting demo websocket client...');

        $client = new Client(
            'ws://' .
            ($this->swooleConfig['ws']['host'] ?? self::DEFAULT_SWOOLE_HOST) . ':' .
            ($this->swooleConfig['ws']['port'] ?? self::DEFAULT_SWOOLE_PORT)
        );
        $client->send(JsonHelper::encode(['handler' => SwooleTcpJob::class]));
        $this->writeln($client->receive());
        $client->close();
    }