@Override
    public ColumnStatistics buildColumnStatistics()
    {
        return new ColumnStatistics(nonNullValueCount, null, rawSize, storageSize);
    }
@Test
    public void testNoValues()
    {
        CountStatisticsBuilder statisticsBuilder = new CountStatisticsBuilder();
        ColumnStatistics columnStatistics = statisticsBuilder.buildColumnStatistics();
        assertEquals(columnStatistics.getNumberOfValues(), 0);
    }