EmberJS: How to check if a component exists (inside another component)?

My goal is to resolve to a generic component is the component doesn't exists. It managed to do it like this:

  // app/components/dynamic-widget.js
  ...
  widgetName: function() {
    var name = this.get('config.name');
    if (!this.container.resolve('component:'+name)) {
       name = 'generic-widget';
    }
    return name;
  }.property('config.name')
  ...

Then in app/templates/components/dynamic-widget.hbs:

    {{component widgetName}}

Then, I could use my dynamic-component like this:

    {{dynamic-widget 'foo-widget'}}

If foo-widget is not implemented, it fallback into generic-widget.

But since EmberJS 1.11, resolving a component from a component's container is deprecated:

DEPRECATION: resolve should be called on the registry instead of the container

So my question is, how can I check if a component actually exists without using this.container.resolve ?

Thanks a lot.