ehavior by mixing in
<a href="https://api.emberjs.com/classes/Ember.MutableArray.html"><code>Ember.MutableArray</code></a>. That means
that you can manipulate the collection of views very expressively, using
methods like <code>pushObject</code>, <code>popObject</code>, <code>shiftObject</code>, <code>unshiftObject</code>, <code>insertAt</code>,
<code>removeAt</code>, or any other method you would use to interact with an Ember array.</p>
</section>
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