QueueLimit           uint64         `json:"queueLimit"`
}

// Validate MQTTArgs fields
func (m MQTTArgs) Validate() error {
	if !m.Enable {
		return nil
	}
	u, err := xnet.ParseURL(m.Broker.String())
	if err != nil {
		return err
	}
	switch u.Scheme {
	case "ws", "wss", "tcp", "ssl", "tls", "tcps":
	default:
		return errors.New("unknown protocol in broker address")
	}

		}
		if !enabled {
			continue
		}

		brokerEnv := target.EnvMQTTBroker
		if k != config.Default {
			brokerEnv = brokerEnv + config.Default + k
		}

		brokerURL, err := xnet.ParseURL(env.Get(brokerEnv, kv.Get(target.MqttBroker)))
		if err != nil {
			return nil, err
		}

		reconnectIntervalEnv := target.EnvMQTTReconnectInterval
		if k != config.Default {