private static function listSeparator($sUrl)
    {
        $armSeparatorPosition = array();
        foreach (RouteCollection::getSeparator() as $cSeparator) {
            $sUrlSearch = $sUrl;
            while ($nSeparatorPosition = strrpos($sUrlSearch, $cSeparator)) {
                $armSeparatorPosition[$nSeparatorPosition] = $cSeparator;
                $sUrlSearch = substr($sUrlSearch, 0, $nSeparatorPosition);
            }
        }
        ksort($armSeparatorPosition);
        return array_values($armSeparatorPosition);
    }