presto-main/src/main/java/io/prestosql/operator/aggregation/state/LongDecimalWithOverflowStateFactory.java/LongDecimalWithOverflowStateFactory/getGroupedStateClass
class LongDecimalWithOverflowStateFactory:    @Override
    public Class<? extends LongDecimalWithOverflowState> getGroupedStateClass()
    {
        return GroupedLongDecimalWithOverflowState.class;
    }