public function getPageTypes(Contao\DataContainer $dc)
	{
		$arrOptions = array();

		foreach (array_keys($GLOBALS['TL_PTY']) as $pty)
		{
			// Root pages are allowed on the first level only (see #6360)
			if ($pty == 'root' && $dc->activeRecord && $dc->activeRecord->pid > 0)
			{
				continue;
			}

			// Allow the currently selected option and anything the user has access to
			if ($pty == $dc->value || $this->User->hasAccess($pty, 'alpty'))
			{
				$arrOptions[] = $pty;
			}
		}

		return $arrOptions;
	}