public Histogram histogram(String name) {
        return histogram(MetricName.build(name));
    }
@Test
    public void accessingAHistogramRegistersAndReusesIt() throws Exception {
        final Histogram histogram1 = registry.histogram(THING);
        final Histogram histogram2 = registry.histogram(THING);

        assertThat(histogram1)
                .isSameAs(histogram2);

        verify(listener).onHistogramAdded(THING, histogram1);
    }