code: func hasTimestamps(parsedFamilies map[string]*dto.MetricFamily) bool {
  	for _, mf := range parsedFamilies {
  		for _, m := range mf.Metric {
  			if m.TimestampMs != nil {
  				return true
  			}
  		}
  	}
  	return false
  }
docs: // hasTimestamps returns true when metrics contain unsupported timestamps.