public Long getLongHeader(Message in, String header, Long defaultValue) {
        return in.getHeader(header, defaultValue, Long.class);
    }
@Test
    public void testGetLongHeader() {
        when(in.getHeader(HEADER_HISTOGRAM_VALUE, 19L, Long.class)).thenReturn(201L);
        assertThat(okProducer.getLongHeader(in, HEADER_HISTOGRAM_VALUE, 19L), is(201L));
        inOrder.verify(in, times(1)).getHeader(HEADER_HISTOGRAM_VALUE, 19L, Long.class);
        inOrder.verifyNoMoreInteractions();
    }