在Golang中深度复制地图

func deepCopyJSON(src map[string]interface{}, dest map[string]interface{}) error {    if src == nil {        return errors.New("src is nil. You cannot read from a nil map")    }    if dest == nil {        return errors.New("dest is nil. You cannot insert to a nil map")    }    jsonStr, err := json.Marshal(src)    if err != nil {        return err    }    err = json.Unmarshal(jsonStr, &dest)    if err != nil {        return err    }    return nil}