presto-main/src/main/java/io/prestosql/type/setdigest/BuildSetDigestAggregation.java/BuildSetDigestAggregation/output
class BuildSetDigestAggregation:    @OutputFunction(SetDigestType.NAME)
    public static void output(SetDigestState state, BlockBuilder out)
    {
        SERIALIZER.serialize(state, out);
    }