silverstripe / silverstripe-cms

		if(!$sitetree) {

			$parentID = self::config()->nested_urls ? 0 : null;

			if($alternatives = singleton('SiteTree')->extend('alternateGetByLink', $URLSegment, $parentID)) {

				foreach($alternatives as $alternative) if($alternative) $sitetree = $alternative;

			}

			if(!$sitetree) return false;

		}

			if(!$next) {

				$parentID = (int) $sitetree->ID;

				if($alternatives = singleton('SiteTree')->extend('alternateGetByLink', $segment, $parentID)) {

					foreach($alternatives as $alternative) if($alternative) $next = $alternative;

				}

				if(!$next) return false;

			}