public static TaskHistoryItemModel FilledBy(this TaskHistoryItemModel model, HistoryItem item)
        {
            model.CreateTime = item.CreateTime;

            UserModel executor = new UserModel();
            executor.FilledBy(item.Executor);
            model.Executor = executor;
            model.Comment = item.Comment;
            model.Description = item.Description;

            return model;
        }
        private HistoryItem create_item(Task task, Status status)
        {
            HistoryItem item = new HistoryItem();
            item.SetProperty("Belong", task);
            item.SetProperty("Status", status);
            Save(item);

            return item;
        }
 private void contains(List<HistoryItem> items, HistoryItem item)
 {
     Assert.That(items.Exists(h => h.Id == item.Id));
 }