docs: public boolean searchIdRegex(final String idRegex) {
      if (idRegex == null) {
        log.error("Unable to search for a null Identifier regex.");
        return false;
      }
      IdSearchMessage message = new IdSearchMessage();
      message.setIdRegex(idRegex);
      this.session.write(message);
      log.debug("Sent {}", message);
  
      return true;
    }