视频智能安防监控系统EasyNVR是如何做到在平台内屏蔽部分菜单或者logo标识的？

func (h *APIHandler) GetServerInfo(c *gin.Context) {
   ack := NewMsgAck()
   ack.EasyDarwin.Header.MessageType = MSG_SC_SERVER_INFO_ACK
   sec := utils.Conf().Section("base_config")
   shieldMenu := sec.Key("shield_menu").MustBool(false)
   server := fmt.Sprintf("%s/%s (Build/%s; Platform/%s;)", "EasyNVR", global.BuildVersion, BuildTime.Format(utils.BuildTimeLayout), strings.Title(runtime.GOOS))
   if shieldMenu {
      server = fmt.Sprintf("%s (Build/%s; Platform/%s;)", global.BuildVersion, BuildTime.Format(utils.BuildTimeLayout), strings.Title(runtime.GOOS))
   }
   ack.EasyDarwin.Body = map[string]interface{}{
      "Authorization":    license.Authorization,
      "VersionType":      fmt.Sprintf("%v", license.VersionType),
      "Hardware":         strings.ToUpper(runtime.GOARCH),
      "InterfaceVersion": InterfaceVersion,
      "IsDemo":           sec.Key("demo").MustBool(false),
      "IsRtsp":           sec.Key("enable_rtsp").MustBool(false),
      "LiveStreamAuth":   sec.Key("live_streaming_auth").MustBool(false),
      "ChannelCount":     license.ChannelCount,
      "RemainDays":       license.RemainDays(),
      "ActiveOnline":     license.ActiveOnline,
      "RunningTime":      utils.UpTimeString(),
      "ServerTime":       utils.DateTime(time.Now()),
      "StartUpTime":      utils.DateTime(utils.StartTime),
      "Server":           server,
      "shieldMenu":       shieldMenu,
   }
   c.IndentedJSON(http.StatusOK, ack)
}