silverstripe-cms/tests/php/Controllers/CMSMainTest_HiddenClass.php

<?php

namespace SilverStripe\CMS\Tests\Controllers;

use SilverStripe\Dev\TestOnly;
use SilverStripe\ORM\HiddenClass;
use Page;

class CMSMainTest_HiddenClass extends Page implements TestOnly, HiddenClass
{

}