public void incGroupGetSize(final String group, final String topic, final int incValue) {
        final String statsKey = buildStatsKey(topic, group);
        this.statsTable.get(Stats.GROUP_GET_SIZE).addValue(statsKey, incValue, 1);
    }
@Test
    public void testIncGroupGetSize() {
        brokerStatsManager.incGroupGetSize(GROUP_NAME, TOPIC, 1);
        String statsKey = brokerStatsManager.buildStatsKey(TOPIC, GROUP_NAME);
        assertThat(brokerStatsManager.getStatsItem(GROUP_GET_SIZE, statsKey).getValue().doubleValue()).isEqualTo(1L);
    }