code: func (pc *ConfigCmd) Execute(conf common.Config) error {
  	if pc.server == nil || *pc.server == "" {
  		return errors.New("no server specified")
  	}
  	if pc.channel == nil || *pc.channel == "" {
  		return errors.New("no channel specified")
  	}
  
  	server := *pc.server
  	channel := *pc.channel
  
  	req := discovery.NewRequest().OfChannel(channel).AddConfigQuery()
  	res, err := pc.stub.Send(server, conf, req)
  	if err != nil {
  		return err
  	}
  	return pc.parser.ParseResponse(channel, res)
  }
docs: // Execute executes the command