presto-main/src/main/java/io/prestosql/type/UuidOperators.java/UuidOperators/hashCode
class UuidOperators:    @ScalarOperator(HASH_CODE)
    @SqlType(StandardTypes.BIGINT)
    public static long hashCode(@SqlType(StandardTypes.UUID) Slice value)
    {
        return XxHash64.hash(value);
    }