code: func (*Room) SetSummary(
  	ctx context.Context,
  	arg *messages.SetSummaryArg,
  ) (*messages.Response, error) {
  	counterMetricName := "my_summary"
  
  	for _, reporter := range pitaya.GetMetricsReporters() {
  		reporter.ReportSummary(counterMetricName, map[string]string{
  			"tag1": arg.Tag,
  		}, arg.Value)
  	}
  
  	return messages.OKResponse(), nil
  }
docs: // SetSummary sets custom my_summary