/**
  * Loads the quote storage.
  */
 protected static function loadStorage()
 {
     if (self::$quoteStorage === null || self::$quoteCounts === null) {
         self::$quoteStorage = WCF::getSession()->getVar('quoteStorage');
         if (self::$quoteStorage === null) {
             self::$quoteStorage = array();
         }
         self::$quoteCounts = WCF::getSession()->getVar('quoteCounts');
         if (self::$quoteCounts === null) {
             self::$quoteCounts = array();
         }
     }
 }