docs: void idSearchResponseReceived(ClientWorldModelInterface worldModel,
        IdSearchResponseMessage message) {
      log.debug("Got an Identifier search response: {}", message);
      String[] matching = message.getMatchingIds();
      if (matching == null) {
        this.idSearchResponses.add(new String[] {});
      } else {
        this.idSearchResponses.add(matching);
      }
    }