presto-orc/src/main/java/io/prestosql/orc/OrcWriteValidation.java/OrcWriteValidation/reset
class OrcWriteValidation:        public void reset()
        {
            rowCount = 0;
            columnStatisticsValidations = types.stream()
                    .map(ColumnStatisticsValidation::new)
                    .collect(toImmutableList());
        }