presto-orc/src/main/java/io/prestosql/orc/metadata/statistics/BinaryStatisticsBuilder.java/BinaryStatisticsBuilder/buildBinaryStatistics
class BinaryStatisticsBuilder:    private Optional<BinaryStatistics> buildBinaryStatistics()
    {
        if (nonNullValueCount == 0) {
            return Optional.empty();
        }
        return Optional.of(new BinaryStatistics(sum));
    }