@Override
  public Histogram labels(final String... labels) {
    final var ddp = histogram.labelValues(labels);
    return ddp::observe;
  }
A Prometheus histogram. 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/PrometheusHistogram.java