presto-main/src/main/java/io/prestosql/operator/aggregation/IntervalYearToMonthSumAggregation.java/IntervalYearToMonthSumAggregation/output
class IntervalYearToMonthSumAggregation:    @OutputFunction(INTERVAL_YEAR_TO_MONTH)
    public static void output(NullableLongState state, BlockBuilder out)
    {
        NullableLongState.write(INTERVAL_YEAR_MONTH, state, out);
    }