azure函数:异步方法和输出参数

我想在我的Azure函数中使用输出队列。我从下面得到一个示例代码: https://docs.microsoft.com/en-us/sandbox/functions-recipes/queue-storage

[FunctionName("BasicQueueOutput")]
public static void Run([TimerTrigger("*/30 * * * * *")]TimerInfo myTimer,
                       TraceWriter log,
                       [Queue("101functionsqueue",Connection = "AzureWebJobsStorage")] out string queueMessage)
{
    log.Info("101 Azure Function Demo - Storage Queue output");

    queueMessage = DateTime.UtcNow.ToString();
}

它对sync方法很好,但在我的例子中它是异步方法:

    [FunctionName("FunctionRegisterDomain")]
    public async static Task Run(
        [QueueTrigger("domain-registation", Connection = "StorageConnectionString")]DomainForRegistration queueItem,
        [Queue("domain-add-to-office365", Connection = "StorageConnectionString")]out DomainForRegistration outputQueue,
        ILogger log)

我得到一个错误:

异步方法不能有ref、in或out参数

当然,我可以做到:

    [Queue("domain-add-to-office365", Connection = "StorageConnectionString")]CloudQueue outputQueue,

然后使用它:

await outputQueue.AddMessageAsync(new CloudQueueMessage(JsonConvert.SerializeObject(queueItem)));

但我想使用到队列消息的绑定来完成这项工作