you don't, a parent class may not have an opportunity to do important
setup work, and you'll see strange behavior in your application.</p>
<p>Arrays and objects defined directly on any <code>Ember.Object</code> are shared across all instances of that class.</p>
<pre class="language-javascript line-numbers"><code class="javascript language-javascript"><span class="token keyword">import</span> EmberObject <span class="token keyword">from</span> <span class="token string">'@ember/object'</span><span class="tok