SimplePie::set_sanitize_class PHP Method

    public function set_sanitize_class($class = 'SimplePie_Sanitize')
    {
        return $this->registry->register('Sanitize', $class, true);
    }

 function fetch_feed2($url)
 {
     require_once ABSPATH . WPINC . '/class-feed.php';
     $feed = new SimplePie();
     $feed->set_sanitize_class('WP_SimplePie_Sanitize_KSES');
     // We must manually overwrite $feed->sanitize because SimplePie's
     // constructor sets it before we have a chance to set the sanitization class
     $feed->sanitize = new WP_SimplePie_Sanitize_KSES();
     $feed->set_cache_class('WP_Feed_Cache');
     $feed->set_file_class('WP_SimplePie_File');
     $feed->set_feed_url($url);
     $feed->force_feed(true);
     /** This filter is documented in wp-includes/class-feed.php */
     $feed->set_cache_duration(apply_filters('wp_feed_cache_transient_lifetime', 12 * HOUR_IN_SECONDS, $url));
     /**
      * Fires just before processing the SimplePie feed object.
      *
      * @since 3.0.0
      *
      * @param object &$feed SimplePie feed object, passed by reference.
      * @param mixed  $url   URL of feed to retrieve. If an array of URLs, the feeds are merged.
      */
     do_action_ref_array('wp_feed_options', array(&$feed, $url));
     $feed->init();
     $feed->handle_content_type();
     if ($feed->error()) {
         return new WP_Error('simplepie-error', $feed->error());
     }
     return $feed;
 }