如何替换DomRepeatModel.item？

Question

我有以下代码片段，用于监听由dom-repeat（Polymer 1.0.0-rc.17）创建的列表上的项目的按钮单击事件。根据polymer.dart change.log，DomRepeatModel.item is now deprecated, although it will properly use the as attribute for now. The [] operator has been added in its place。任何人都知道如何将它应用于代码以获得相同的结果？

@reflectable
handlePurchase(event, [_]) {
    print('Purchase item');
    var model = new DomRepeatModel.fromEvent(event);
    ShopItem item = model.item;

    print(item.name);
    print(item.price);
}

Answer 1

找到答案，它只是模型['item']。