presto-orc/src/main/java/io/prestosql/orc/OrcWriteValidation.java/StatisticsValidation/build
class StatisticsValidation:        public Optional<ColumnMetadata<ColumnStatistics>> build()
        {
            if (rowCount == 0) {
                return Optional.empty();
            }
            ImmutableList.Builder<ColumnStatistics> statisticsBuilders = ImmutableList.builder();
            statisticsBuilders.add(new ColumnStatistics(rowCount, 0, null, null, null, null, null, null, null, null));
            columnStatisticsValidations.forEach(validation -> validation.build(statisticsBuilders));
            return Optional.of(new ColumnMetadata<>(statisticsBuilders.build()));
        }