/// <summary>
/// Checks the given activity for a backchannel message ordering the bot to send out
/// notifications.
/// </summary>
/// <param name="activity">The received activity.</param>
/// <param name="cancellationToken"></param>
/// <returns>The notification data as JSON string, if found. An empty string otherwise.</returns>
#pragma warning disable 1998
protected override async Task <string> PrepareAsync(IActivity activity, CancellationToken cancellationToken)
{
string notificationData = string.Empty;
NotificationsManager.TryGetNotificationData((activity as Activity), out notificationData);
return(notificationData);
}
