public ActionResult Repeal(Guid documentId, string activityTypeCode)
{
var taskId = _activityManager.GetCurrentTaskId(documentId, activityTypeCode);
if (taskId == null)
{
throw new ArgumentException("Нет доступных заданий для отмены");
}
_activityManager.CancelTask(taskId.Value);
return(Json("OK", JsonRequestBehavior.AllowGet));
}