presto-main/src/main/java/io/prestosql/operator/aggregation/state/LongDecimalWithOverflowStateFactory.java/GroupedLongDecimalWithOverflowState/setOverflow
class GroupedLongDecimalWithOverflowState:        @Override
        public void setOverflow(long overflow)
        {
            overflows.set(getGroupId(), overflow);
        }