docs: static void pingHost(InetSocketAddress address, HttpServerExchange exchange, PingCallback callback, OptionMap options) {
  
          final XnioIoThread thread = exchange.getIoThread();
          final XnioWorker worker = thread.getWorker();
          final HostPingTask r = new HostPingTask(address, worker, callback, options);
          // Schedule timeout task
          scheduleCancelTask(exchange.getIoThread(), r, 5, TimeUnit.SECONDS);
          exchange.dispatch(exchange.isInIoThread() ? SameThreadExecutor.INSTANCE : thread, r);
      }