lass="s">"updated_at"</span><span class="p">:</span> <span class="s">"2018-12-17T15:23:26.591179Z"</span><span class="p">,</span>
    <span class="s">"duration"</span><span class="p">:</span><span class="s">"0.45ms"</span>
<span class="p">}</span>
</code></pre>

<p>You can extend our opened <code><a href="Classes/CollectionObject.html">CollectionObject</a></code> class for the default protocol properties.</p>

<p>Example with custom properties:</p>
<pre class="highlight swift"><code>    <span class="kd">fin