public function getTitle()
 {
     if ($this->title != '') {
         return $this->title;
     }
     // get view class by type
     $strClass = $GLOBALS['WLV'][$this->type];
     if (!class_exists($strClass)) {
         return;
     }
     $strategy = new $strClass();
     $view = new WatchlistItemView($strategy);
     return $view->getTitle($this);
 }