presto-raptor-legacy/src/main/java/io/prestosql/plugin/raptor/legacy/util/UuidUtil.java/UuidUtil/uuidStringToBytes
class UuidUtil:    public static Slice uuidStringToBytes(Slice uuidSlice)
    {
        UUID uuid = UUID.fromString(uuidSlice.toStringUtf8());
        byte[] bytes = uuidToBytes(uuid);
        return Slices.wrappedBuffer(bytes);
    }