code: func (p *PrometheusReporter) ReportCount(metric string, labels map[string]string, count float64) error {
  	cnt := p.countReportersMap[metric]
  	if cnt != nil {
  		labels = p.ensureLabels(labels)
  		cnt.With(labels).Add(count)
  		return nil
  	}
  	return constants.ErrMetricNotKnown
  }
docs: // ReportCount reports a summary metric