@Override
  public void unregister(final PrometheusRegistry registry) {
    registry.unregister(histogram);
  }
Abstract base class for Prometheus histogram collectors. A histogram samples durations and counts
them in configurable buckets. * It also provides a sum of all observed values.
metrics/core/src/main/java/org/hyperledger/besu/metrics/prometheus/AbstractPrometheusHistogram.java