在windows 10 uwp中获取通知来源？

<uap:Capability Name="internetClient" />
<uap:Capability Name="internetClientServer" />
<uap:Capability Name="privateNetworkClientServer" />
<uap:Capability Name="userNotificationListener" />

using Windows.UI.Notifications;

// 获取通知来源
UserNotificationListener listener = UserNotificationListener.Current;
UserNotificationListenerAccessStatus accessStatus = await listener.RequestAccessAsync();

if (accessStatus == UserNotificationListenerAccessStatus.Allowed)
{
    // 获取通知来源列表
    IReadOnlyList<UserNotificationListenerAccessStatus> sources = await listener.GetAccessStatusAsync();

    foreach (UserNotificationListenerAccessStatus source in sources)
    {
        // 处理通知来源
        // ...
    }
}