observing injected objects

controllers.application.js

import Ember from 'ember';

var MockImportedObject = Ember.Object.create({
	counter: 1
});

export default Ember.Controller.extend({
  MockImportedObject,
  counter: Ember.computed.alias('MockImportedObject.counter'),
  actions: {
  	increment() {
    	this.incrementProperty('MockImportedObject.counter');
    }
  }
});

templates.application.hbs

<h2>MockImportedObject.counter:</h2>
{{MockImportedObject.counter}}

<h2>counter computed alias:</h2>
{{counter}}
<br/><br/>
<button {{action "increment"}}>Increment Counter</button>

twiddle.json

{
  "version": "0.7.2",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": 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"
  }
}