Mirage - Get Header data

mirage.config.js

import { Response } from 'ember-cli-mirage';

export default function() {
  //window.server = this;
  
  this.get('/foo', () => {
    return new Response( 200, { SOME: 'HEADER', ANOTHER: 'HEADER' } , { the: 'data' } );
  });
};

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  
  model() {
    return Ember.$.getJSON('/foo').then((data, response, object) => {
      return object.getAllResponseHeaders();
    });
  }
  
  
});

templates.application.hbs

<h1>Mirage boilerplate</h1>

<div class='pa4'>
  <p>The headers are:</p>
  <p>{{model}}</p>
</div>

twiddle.json

{
  "version": "0.10.4",
  "ENV": {
    "ember-cli-mirage": {
      "enabled": true
    }
  },
  "EmberENV": {
    "FEATURES": {
      "ds-finder-include": true
    }
  },
  "options": {
    "use_pods": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.4/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.4.3/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.4/ember-template-compiler.js"
  },
  "addons": {
    "ember-cli-mirage": "0.2.5"
  }
}