@Override
    public void accept(final MeterEntity entity, final DataTable value) {
        this.entityId = entity.id();
        this.serviceId = entity.serviceId();
        this.summation.append(value);
        DataTable c = new DataTable();
        value.keys().forEach(key -> c.put(key, 1L));
        this.count.append(c);
    }
@Test
    public void testAccept() {
        function.accept(
            MeterEntity.newService("request_count", Layer.GENERAL), build(asList("200", "404"), asList(10L, 2L)));
        assertResult(asList("200", "404"), asList(10L, 2L), asList(1L, 1L));
        function.accept(
            MeterEntity.newService("request_count", Layer.GENERAL), build(asList("200", "500"), asList(2L, 3L)));
        assertResult(asList("200", "404", "500"), asList(12L, 2L, 3L), asList(2L, 1L, 1L));
    }