public Task DeleteListenersAsync(IEnumerable <string> arns, CancellationToken cancellationToken = default(CancellationToken)) => arns.ForEachAsync(arn => _clientV2.DeleteListenerAsync( new DeleteListenerRequest() { ListenerArn = arn }, cancellationToken), _maxDegreeOfParalelism, cancellationToken ).EnsureSuccess();