public function checkPermission()
	{
		$bundles = Contao\System::getContainer()->getParameter('kernel.bundles');

		// HOOK: comments extension required
		if (!isset($bundles['ContaoCommentsBundle']))
		{
			$key = array_search('allowComments', $GLOBALS['TL_DCA']['tl_faq']['list']['sorting']['headerFields']);
			unset($GLOBALS['TL_DCA']['tl_faq']['list']['sorting']['headerFields'][$key]);
		}
	}