default void createSummary(
      final MetricCategory category,
      final String name,
      final String help,
      final Supplier<ExternalSummary> summarySupplier) {
    createLabelledSuppliedSummary(category, name, help).labels(summarySupplier);
  }
Create a summary that is computed externally to this metric system. Useful when existing
libraries calculate the summary data on their own, and we want to export that summary via the
configured metric system. A notable example are RocksDB statistics.

@param category The {@link MetricCategory} this external summary is assigned to.
@param name A name for the metric.
@param help A human readable description of the metric.
@param summarySupplier A supplier to retrieve the summary data when needed.
plugin-api/src/main/java/org/hyperledger/besu/plugin/services/MetricsSystem.java