public function getIcon()
 {
     $thumbnail = $this->getThumbnail();
     if ($thumbnail) {
         return $thumbnail->getUrl();
     }
     return parent::getIcon();
 }
 public function getIcon()
 {
     $thumbnail = $this->getThumbnail();
     if ($thumbnail) {
         return $thumbnail->getUrl();
     } elseif (sfConfig::get('app_sf_media_browser_thumbnails_simulated', false)) {
         return $this->getUrl();
     }
     return parent::getIcon();
 }