presto-orc/src/main/java/io/prestosql/orc/OrcWriteValidation.java/OrcWriteValidationBuilder/addStripeStatistics
class OrcWriteValidationBuilder:        public void addStripeStatistics(long stripStartOffset, StripeStatistics columnStatistics)
        {
            stripeStatistics.put(stripStartOffset, columnStatistics);
            rowGroupStatisticsByStripe.put(stripStartOffset, currentRowGroupStatistics);
            currentRowGroupStatistics = new ArrayList<>();
        }