<p>Fired when loading editor button data for customization in the control panel. This is called before separators or custom dropdowns are added.</p>

<p>Callback signature:</p>
<blockquote><code><em>array</em> &amp;$buttons, <em>\XF\Data\Editor</em> $editorData</code></blockquote>

<p>Arguments:</p>
<ol>
	<li><code><em>array</em> &amp;$buttons</code> - List of buttons that people can customize their editor toolbar with.</li>
	<li><code><em>\XF\Data\Editor</em> $editorData</code> - The editor data object triggering the event.</li>
</ol>