public static DropwizardMeterRegistry newRegistry() {
        return newRegistry(new MetricRegistry(), DEFAULT_NAME_MAPPER);
    }
Returns a newly-created {@link DropwizardMeterRegistry} instance with the default
{@link HierarchicalNameMapper}.
core/src/main/java/com/linecorp/armeria/common/metric/DropwizardMeterRegistries.java