presto-main/src/main/java/io/prestosql/operator/aggregation/DefaultApproximateCountDistinctAggregation.java/DefaultApproximateCountDistinctAggregation/combineState
class DefaultApproximateCountDistinctAggregation:    @CombineFunction
    public static void combineState(@AggregationState HyperLogLogState state, @AggregationState HyperLogLogState otherState)
    {
        ApproximateCountDistinctAggregation.combineState(state, otherState);
    }