static function Get_fb_feed_cached($user_ID)
 {
     global $blog_id;
     $page_id = WPAL2Int::Get_page_id($user_ID, false);
     $fb_key = c_al2fb_transient_cache . md5('f' . $blog_id . $user_ID . $page_id);
     $fb_feed = get_transient($fb_key);
     if (get_option(c_al2fb_option_debug)) {
         $fb_feed = false;
     }
     if ($fb_feed === false) {
         $fb_feed = WPAL2Int::Get_fb_feed($user_ID);
         $duration = WPAL2Int::Get_duration(false);
         set_transient($fb_key, $fb_feed, $duration);
     }
     return $fb_feed;
 }