* elements.length) are all {@code null}.
   */
  @VisibleForTesting @CheckForNull transient @Nullable Object[] elements;

  /**
   * Keeps track of metadata like the number of hash table bits and modifications of this data
   * structure (to make it possible to throw ConcurrentModificationException in the iterator). Note
   * that we choose not to make this volatile, so we do less of a "best effort" to track such

   * ConcurrentModificationException}, and guarantees to traverse elements as they existed upon
   * construction of the iterator, and may (but is not guaranteed to) reflect any modifications
   * subsequent to construction.
   *
   * @return an iterator over the elements in this queue in proper sequence
   */
  @CanIgnoreReturnValue
  @Override
  public Iterator<E> iterator() {

		}
	}

	return nil
}

// To obtain a nats connection from args.
func (n NATSArgs) connectNats() (*nats.Conn, error) {
	connOpts := []nats.Option{nats.Name("Minio Notification"), nats.MaxReconnects(-1)}
	if n.Username != "" && n.Password != "" {
		connOpts = append(connOpts, nats.UserInfo(n.Username, n.Password))
	}
	if n.UserCredentials != "" {

            }
            if (logger.isInfoEnabled()) {
                logger.info("[CRAWL INFO] {}", buf);
            }

            // notification
            try {
                crawler.sendMail(infoMap);
            } catch (final Exception e) {
                logger.warn("Failed to send a mail.", e);
            }

        }
    }

MINIO_API_OBJECT_MAX_VERSIONS             (number)    set max allowed number of versions per object (default: '9223372036854775807')
```

#### Notifications

Notification targets supported by MinIO are in the following list. To configure individual targets please refer to more detailed documentation [here](https://min.io/docs/minio/linux/administration/monitoring.html#bucket-notifications).

```

  // Note:
  // * the number of additional invocations is not guaranteed to be exactly one.
  // * if additional invocations result in further modifications to the object, webhooks are not guaranteed to be invoked again.
  // * webhooks that use this option may be reordered to minimize the number of additional invocations.

	queueDirComment   = `staging dir for undelivered messages e.g. '/home/events'`
	queueLimitComment = `maximum limit for undelivered messages, defaults to '100000'`
)

// Help template inputs for all notification targets
var (
	HelpWebhook = config.HelpKVS{
		config.HelpKV{
			Key:         target.WebhookEndpoint,
			Description: "webhook server endpoint e.g. http://localhost:8080/minio/events",
			Type:        "url",

	BrowserSubSys        = madmin.BrowserSubSys
	ILMSubSys            = madmin.ILMSubsys

	// Add new constants here (similar to above) if you add new fields to config.
)

// Notification config constants.
const (
	NotifyKafkaSubSys    = madmin.NotifyKafkaSubSys
	NotifyMQTTSubSys     = madmin.NotifyMQTTSubSys
	NotifyMySQLSubSys    = madmin.NotifyMySQLSubSys

	ErrInvalidSSECustomerParameters
	ErrIncompatibleEncryptionMethod
	ErrKMSNotConfigured
	ErrKMSKeyNotFoundException
	ErrKMSDefaultKeyAlreadyConfigured

	ErrNoAccessKey
	ErrInvalidToken

	// Bucket notification related errors.
	ErrEventNotification
	ErrARNNotification
	ErrRegionNotification
	ErrOverlappingFilterNotification
	ErrFilterNameInvalid
	ErrFilterNamePrefix
	ErrFilterNameSuffix
	ErrFilterValueInvalid

    TF_Status* status) {
  tensorflow::EagerContext* context =
      tensorflow::ContextFromInterface(tensorflow::unwrap(ctx));
  auto collective_executor_handle = context->GetCollectiveExecutorHandle();
  tensorflow::Notification done;
  collective_executor_handle->get()->remote_access()->CheckPeerHealth(
      task, timeout_in_ms, [&done, status](const Status& s) {
        status->status = s;
        done.Notify();
      });