public function getPhotoFeed($location = null)
    {
        if ($location === null) {
            $uri = self::PICASA_BASE_FEED_URI . '/' .
                self::DEFAULT_PROJECTION . '/' .
                self::COMMUNITY_SEARCH_PATH;
        } else if ($location instanceof Zend_Gdata_Photos_UserQuery) {
            $location->setType('feed');
            $uri = $location->getQueryUrl();
        } else if ($location instanceof Zend_Gdata_Query) {
            $uri = $location->getQueryUrl();
        } else {
            $uri = $location;
        }
        return parent::getFeed($uri, 'Zend_Gdata_Photos_PhotoFeed');
    }