code: public <P extends ParaObject> P findById(String id) {
  		MultivaluedMap<String, String> params = new MultivaluedHashMap<>();
  		params.putSingle(Config._ID, id);
  		List<P> list = getItems(find("id", params));
  		return list.isEmpty() ? null : list.get(0);
  	}
docs: Simple id search.
  @param <P> type of the object
  @param id the id
  @return the object if found or null