/**
  * Loads the cached styles.
  */
 protected static function getCache()
 {
     if (self::$cache === null) {
         WCF::getCache()->addResource('style', WCF_DIR . 'cache/cache.style.php', WCF_DIR . 'lib/system/cache/CacheBuilderStyle.class.php');
         self::$cache = WCF::getCache()->get('style');
     }
 }