ratis-metrics-default/src/main/java/org/apache/ratis/metrics/impl/MetricRegistriesImpl.java [67:132]:
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            if (LOG.isDebugEnabled()) {
              LOG.debug("First MetricRegistry has been created without registering reporters. " +
                  "Hence registering JMX reporter by default.");
            }
            enableJmxReporter();
          }
        }
      }

      RatisMetricRegistry registry = factory.create(info);
      reporterRegistrations.forEach(reg -> reg.accept(registry));
      return registry;
    });
  }

  @Override
  public boolean remove(MetricRegistryInfo key) {
    RatisMetricRegistry registry = registries.get(key);
    if (registry != null) {
      stopReporters.forEach(reg -> reg.accept(registry));
    }

    return registries.remove(key) == null;
  }

  @Override
  public Optional<RatisMetricRegistry> get(MetricRegistryInfo info) {
    return Optional.ofNullable(registries.get(info));
  }

  @Override
  public Collection<RatisMetricRegistry> getMetricRegistries() {
    return Collections.unmodifiableCollection(registries.values());
  }

  @Override
  public void clear() {
    registries.clear();
  }

  @Override
  public Set<MetricRegistryInfo> getMetricRegistryInfos() {
    return Collections.unmodifiableSet(registries.keySet());
  }

  @Override
  public void addReporterRegistration(Consumer<RatisMetricRegistry> reporterRegistration,
      Consumer<RatisMetricRegistry> stopReporter) {
    if (registries.size() > 0) {
      LOG.warn("New reporters are added after registries were created. Some metrics will be missing from the reporter. "
          + "Please add reporter before adding any new registry.");
    }
    this.reporterRegistrations.add(reporterRegistration);
    this.stopReporters.add(stopReporter);
  }

  @Override
  public void removeReporterRegistration(Consumer<RatisMetricRegistry> reporterRegistration,
      Consumer<RatisMetricRegistry> stopReporter) {
    this.reporterRegistrations.remove(reporterRegistration);
    this.stopReporters.remove(stopReporter);
  }

  @Override
  public void enableJmxReporter() {
    addReporterRegistration(
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ratis-metrics-dropwizard3/src/main/java/org/apache/ratis/metrics/dropwizard3/Dm3MetricRegistriesImpl.java [67:130]:
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          if (LOG.isDebugEnabled()) {
            LOG.debug("First MetricRegistry has been created without registering reporters. " +
                    "Hence registering JMX reporter by default.");
          }
          enableJmxReporter();
        }
      }
      RatisMetricRegistry registry = factory.create(info);
      reporterRegistrations.forEach(reg -> reg.accept(registry));
      return registry;
    });
  }

  @Override
  public boolean remove(MetricRegistryInfo key) {
    RatisMetricRegistry registry = registries.get(key);
    if (registry != null) {
      stopReporters.forEach(reg -> reg.accept(registry));
    }

    return registries.remove(key) == null;
  }

  @Override
  public Optional<RatisMetricRegistry> get(MetricRegistryInfo info) {
    return Optional.ofNullable(registries.get(info));
  }

  @Override
  public Collection<RatisMetricRegistry> getMetricRegistries() {
    return Collections.unmodifiableCollection(registries.values());
  }

  @Override
  public void clear() {
    registries.clear();
  }

  @Override
  public Set<MetricRegistryInfo> getMetricRegistryInfos() {
    return Collections.unmodifiableSet(registries.keySet());
  }

  @Override
  public void addReporterRegistration(Consumer<RatisMetricRegistry> reporterRegistration,
      Consumer<RatisMetricRegistry> stopReporter) {
    if (registries.size() > 0) {
      LOG.warn("New reporters are added after registries were created. Some metrics will be missing from the reporter. "
          + "Please add reporter before adding any new registry.");
    }
    this.reporterRegistrations.add(reporterRegistration);
    this.stopReporters.add(stopReporter);
  }

  @Override
  public void removeReporterRegistration(Consumer<RatisMetricRegistry> reporterRegistration,
      Consumer<RatisMetricRegistry> stopReporter) {
    this.reporterRegistrations.remove(reporterRegistration);
    this.stopReporters.remove(stopReporter);
  }

  @Override
  public void enableJmxReporter() {
    addReporterRegistration(
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