presto-main/src/main/java/io/prestosql/operator/aggregation/IntervalYearToMonthAverageAggregation.java/IntervalYearToMonthAverageAggregation/IntervalYearToMonthAverageAggregation
class IntervalYearToMonthAverageAggregation:    private IntervalYearToMonthAverageAggregation() {}