docs: public static Resource create(String hostname, String name, String id, String type) {
      Map<String, String> labels = new LinkedHashMap<String, String>();
      labels.put(HOSTNAME_KEY, checkNotNull(hostname, "hostname"));
      labels.put(NAME_KEY, checkNotNull(name, "name"));
      labels.put(ID_KEY, checkNotNull(id, "id"));
      labels.put(TYPE_KEY, checkNotNull(type, "type"));
      return Resource.create(TYPE, labels);
    }