@Override
    protected TimeStampKeysSelector createTimeStampKeysSelector() {
        TimeStampKeysSelector keysSelector = new TimeStampKeysSelector();
        keysSelector.setSelectBeginTime(false);
        return keysSelector;
    }
@Test
    public void testCreateTimeStampKeysSelector() {
        TimeStampKeysSelector keysSelector = new TimeStampKeysSelector();
        keysSelector.setSelectBeginTime(false);
        assertThat(customGraphConsumer.createTimeStampKeysSelector().getGranularity(), equalTo(keysSelector.getGranularity()));
    }