e. For example,
let's say we'd like to have an alert that can be triggered from anywhere within
our application. The alert function <code>displayAlert</code> should be put into the
<code>ApplicationRoute</code> because all actions and events bubble up to it from
sub-routes and controllers.</p>
<blockquote>
  <p>By default, Ember CLI does not generate a file for its application route.  To
  extend the behavior of the ember application route we will run the command
  <code>ember generate route application</co