code: func (*Room) SetCounter(
  	ctx context.Context,
  	arg *messages.SetCounterArg,
  ) (*messages.Response, error) {
  	counterMetricName := "my_counter"
  
  	for _, reporter := range pitaya.GetMetricsReporters() {
  		reporter.ReportCount(counterMetricName, map[string]string{
  			"tag1": arg.Tag1,
  			"tag2": arg.Tag2,
  		}, arg.Value)
  	}
  
  	return messages.OKResponse(), nil
  }
docs: // SetCounter sets custom my_counter