/**
  * Returns the base URL segment that's used for inclusion of css and
  * javascript files via Requirements.
  *
  * @return string
  *
  * @author Sascha Koehler <*****@*****.**>
  * @since 16.02.2012
  */
 public static function getBaseURLSegment()
 {
     if (is_null(self::$baseURLSegment)) {
         $baseUrl = Director::baseURL();
         if ($baseUrl === '/') {
             $baseUrl = '';
         }
         if (!empty($baseUrl) && substr($baseUrl, -1) != '/') {
             $baseUrl .= '/';
         }
         self::$baseURLSegment = $baseUrl;
     }
     return self::$baseURLSegment;
 }