code: func (c *nfsCollector) updateNFSRequestsv2Stats(ch chan<- prometheus.Metric, s *nfs.V2Stats) {
  	const proto = "2"
  
  	v := reflect.ValueOf(s).Elem()
  	for i := 0; i < v.NumField(); i++ {
  		field := v.Field(i)
  
  		ch <- prometheus.MustNewConstMetric(c.nfsProceduresDesc, prometheus.CounterValue,
  			float64(field.Uint()), proto, v.Type().Field(i).Name)
  	}
  }
docs: // updateNFSRequestsv2Stats collects statistics for NFSv2 requests.