default void createGauge(
      final MetricCategory category,
      final String name,
      final String help,
      final DoubleSupplier valueSupplier) {
    createLabelledSuppliedGauge(category, name, help).labels(valueSupplier);
  }
Creates a gauge for displaying double vales. A gauge is a metric to report the current value.
The metric value may go up or down.

@param category The {@link MetricCategory} this gauge is assigned to.
@param name A name for this metric.
@param help A human readable description of the metric.
@param valueSupplier A supplier for the double value to be presented.
plugin-api/src/main/java/org/hyperledger/besu/plugin/services/MetricsSystem.java