<p>Called during the API <code>\XF\Api\App</code> object setup.</p>

<p>Callback signature:</p>
<blockquote><code><em>\XF\Api\App</em> $app, <em>array</em> &amp;$keys</code></blockquote>

<p>Arguments:</p>
<ol>
	<li><code><em>\XF\Api\App</em> $app</code> - The API app object.</li>
	<li><code><em>array</em> &amp;$keys</code> - An array of keys to preload from the registry.</li>
</ol>