public MeterBinder newMeterBinder(String groupName) {
        return newMeterBinder(new MeterIdPrefix("armeria.client.endpoint.group", "name", groupName));
    }
Returns a newly-created {@link MeterBinder} which binds the stats about this
{@link HealthCheckedEndpointGroup} with the default meter names.
core/src/main/java/com/linecorp/armeria/client/endpoint/healthcheck/HealthCheckedEndpointGroup.java