Similarly, the `data` property can also be a function and defined directly on the RouteController. See here:
https://github.com/EventedMind/meteor-iron-router/blob/dev/lib/client/route_controller.js#L74

Example:

```javascript
PostsController = RouteController.extend({
  data: function () {
    return Posts.findOne(this.params._id);
  }
});
```