presto-main/src/main/java/io/prestosql/operator/aggregation/state/LongDecimalWithOverflowAndLongStateFactory.java/GroupedLongDecimalWithOverflowAndLongState/getLong
class GroupedLongDecimalWithOverflowAndLongState:        @Override
        public long getLong()
        {
            return longs.get(getGroupId());
        }