public void registerVcrHelixUpdateGauge(Gauge<Integer> updaterGaugeCount,
      Gauge<Integer> vcrHelixUpdateInProgressGaugeCount) {
    vcrHelixUpdaterGauge = registry.gauge(MetricRegistry.name(VcrReplicationManager.class, "VcrHelixUpdaterGauge"),
        () -> updaterGaugeCount);
    vcrHelixUpdateInProgressGauge =
        registry.gauge(MetricRegistry.name(VcrReplicationManager.class, "VcrHelixUpdateInProgressGauge"),
            () -> vcrHelixUpdateInProgressGaugeCount);
  }
@return the {@link MetricRegistry} where these metrics are registered.
ambry-cloud/src/main/java/com/github/ambry/cloud/VcrMetrics.java