code: public MqttSettings getMqttSettings() {
      MqttSettings settings = new MqttSettings();
      settings.setServerUrl(getSettingValue("mqtt.serverUrl"));
      settings.setClientUrl(getSettingValue("mqtt.clientUrl"));    
      settings.setTopic(getSettingValue("mqtt.topic"));
      settings.setWildcard(getSettingValue("mqtt.wildcard"));
      return settings;
    }
docs: Returns MQTT settings
  
  @return MQTT settings