anchor.diff:    that we want to load. Since we're bootstrapping the app through
     an `UpgradeModule`, we're actually now running the app as a **hybrid app**.
   
  -  This means we are now running both AngularJS and 2 at the same time. That's pretty
  +  This means we are now running both AngularJS and Angular at the same time. That's pretty
     exciting! We're not running any actual Angular components yet though,
     so let's do that next.
   
  
positive.code:   Now that we are loading `phone.service.ts` through an import that is resolved
    by SystemJS, we should **remove the &lt;script&gt; tag** for the service from `index.html`.
    This is something we'll do to all our components as we upgrade them. Simultaneously
    with the AngularJS to 2 upgrade we're also migrating our code from scripts to modules.
  
    At this point we can switch our two components to use the new service
    instead of the old one. We `$inject` it as the downgraded `phone` factory,
  
negative.code: 
    The `upgrade` module in Angular is a very useful tool for upgrading
    anything but the smallest of applications. With it we can mix and match
    AngularJS and Angular components in the same application and have them interoperate
    seamlessly. That means we don't have to do the upgrade work all at once,
    since there's a natural coexistence between the two frameworks during the
    transition period.
  