tead, specify that the observer
should also run after <code>init</code> by using <a href="https://api.emberjs.com/classes/Ember.html#method_on"><code>Ember.on()</code></a>:</p>
<pre class="language-javascript line-numbers"><code class="javascript language-javascript">Person <span class="token operator">=</span> Ember<span class="token punctuation">.</span>Object<span class="token punctuation">.</span><span class="token function">extend</span><span class="token punctuation">(</span><span class="token punctua