MakeBoundHelper for Objects possible?

Hi,

is it possible to create a makeBoundHelper which observes an object and not only a single property?

The guides say its possible but then again the guide is using the deprecated Ember.handlebars.

I managed to get it to work with Ember.Handlebars.makeBoundHelper. But I can’t seem to get it working with the new Ember.HTMLBars.makeBoundHelper syntax.