private String serialize(Object o) {
        OutputStream stream = new ByteArrayOutputStream();
        serializer.serialize(stream, o);
        return stream.toString();
}


 private <T> T deserialize(String s, Class<T> c) {
        InputStream stream = new ByteArrayInputStream(s.getBytes(StandardCharsets.UTF_8));
        return serializer.deserialize(stream, c);
 }