const namespace … const subsystem … var csrDurationRequested … var csrDurationHonored … func init() { … } var registerMetricsOnce … type counterVecMetric … func countCSRDurationMetric(requested, honored counterVecMetric) genericregistry.BeginUpdateFunc { … } func isDurationHonored(want, got time.Duration) bool { … } func compressSignerName(name string) string { … }