//  public string ParseJsonMethodName = "ParseJson";

        public ProtoBufUtil()
        {
            if (instance == null)
            {
                instance = this;
            }
        }
        public ProtoBufUtil(string _descPName        = "Descriptor"
                            , string _parserPName    = "Parser"
                            , string _parseFromMName = "ParseFrom"
                            , string _parseDelMName  = "ParseDelimitedFrom")
        {
            if (instance == null)
            {
                instance = this;
            }

            SetConfig(_descPName, _parserPName, _parseFromMName, _parseDelMName);
        }