public static MetricName getMetricName(
        String group,
        String typeName,
        String name
    ) {
        return getMetricName(
            group,
            typeName,
            name,
            null
        );
    }
@Test
    public void testUntaggedMetric() {
        MetricName metricName = KafkaYammerMetrics.getMetricName(
            "kafka.metrics",
            "TestMetrics",
            "UntaggedMetric"
        );

        assertEquals("kafka.metrics", metricName.getGroup());
        assertEquals("TestMetrics", metricName.getType());
        assertEquals("UntaggedMetric", metricName.getName());
        assertEquals("kafka.metrics:type=TestMetrics,name=UntaggedMetric",
            metricName.getMBeanName());
        assertNull(metricName.getScope());
    }