http://stackoverflow.com/questions/42425985/ember-js-how-do-i-override-one-of-my-superclasss-actions-in-a-component

components.a-1.js

import Ember from 'ember';

export default Ember.Component.extend({
  actions:{
    foo(){
      console.log('foo in A1');
    }
  }
});

components.a-2.js

import Ember from 'ember';
import A1 from './a-1';
export default A1.extend({
  actions:{
    foo(){
      console.log('foo in A2');
      //this._super(...arguments);
    }
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
{{a-2 }}
<br>
{{outlet}}
<br>
<br>

templates.components.a-1.hbs

{{yield}}

templates.components.a-2.hbs

<button {{action 'foo'}}> Foo</button>
{{yield}}

twiddle.json

{
  "version": "0.11.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.2",
    "ember-data": "2.11.0",
    "ember-template-compiler": "2.10.2",
    "ember-testing": "2.10.2"
  },
  "addons": {}
}