docs: protected ServerCnxnFactory createServerFactory() {
          try {
              ServerCnxnFactory serverFactory = new NIOServerCnxnFactory();
              serverFactory.configure(new InetSocketAddress(zookeeperPort), 5000);
              return serverFactory;
          } catch (IOException e) {
              throw new CitrusRuntimeException("Failed to create default zookeeper server factory", e);
          }
      }