presto-main/src/main/java/io/prestosql/operator/aggregation/minmaxby/SliceAndBlockPositionStateSerializer.java/SliceAndBlockPositionStateSerializer/SliceAndBlockPositionStateSerializer
class SliceAndBlockPositionStateSerializer:    SliceAndBlockPositionStateSerializer(Type firstType, Type secondType)
    {
        super(firstType, secondType);
    }