presto-record-decoder/src/main/java/io/prestosql/decoder/dummy/DummyRowDecoder.java/DummyRowDecoder/decodeRow
class DummyRowDecoder:    @Override
    public Optional<Map<DecoderColumnHandle, FieldValueProvider>> decodeRow(byte[] data,
            Map<String, String> dataMap)
    {
        return ALL_NULLS;
    }