我在 Backbone.js 视图中使用Draggabilly.js，如下所示：

var appView = Backbone.View.extend({
    initialize: function(){
        this.render();
    },
    render: function(){
     var draggie = new Draggabilly(this.el);
     draggie.on('dragEnd', this.updateModel); //This works by I can access the this.model
    },
    events: {
      'dragEnd':'updateModel' //This doesn't work
    },
    updateModel: function(instance, event, pointer){
      //Here I want to update my model bassed on the pointer's x and y
      //However I can't access this.model
    }
)};

当拖拽结束时，拖拽能力提供了一个事件'dragEnd'。但是我可以把它作为一个事件集成到我的 Backbone.js 视图中。
能不能请你指点一下？