How to correctly access Ember model data from controller

I am using Ember.RSVP.hash to access multiple models in an Ember controller:

export default Ember.Route.extend({
    model() {
        return Ember.RSVP.hash({
            categories: this.store.findAll('category')
            languages: this.store.findAll('language'),
            requirementTypes: this.store.findAll('requirement-type')
        });
    },

    setupController: function(controller, models) {
        controller.set('categories', models.categories);
        controller.set('languages', models.languages);
        controller.set('requirementTypes', models.requirementTypes);
    }
});

I have relentlessly Googled how to access this model data in my controller properly. The only way I have found so far feels far too hacky. I just want to have access to the raw HTTP response data that is returned from my api.

However, when I write this.get('categories'), the what I get back is rather ugly and is a much more complex object than what my api returned:

The "InternalModel" entries contain the actual data in the _data attribute that was returned from my api:

Is there a better, recommended way to access this model data that is returned from my api and passed to the controller via the associated route? I was expecting to be able to access the exact data my api returned with something like this.get('categories') and immediately access the model data my api sent.