static function get_fbsdk()
 {
     if (self::$fbsdk && self::$fbsdk instanceof Sigami_Facebook) {
         if (get_option('wpemfb_force_app_token', 'true') == 'true') {
             self::$fbsdk->setAccessToken(get_option('wpemfb_app_id') . '|' . get_option('wpemfb_app_secret'));
         }
         return self::$fbsdk;
     } else {
         if (!class_exists('FacebookApiException')) {
             require_once "base_facebook.php";
         }
         require_once "class-sigami-facebook.php";
         $config = array();
         if (WP_Embed_FB_Plugin::has_fb_app()) {
             $config['appId'] = get_option('wpemfb_app_id');
             $config['secret'] = get_option('wpemfb_app_secret');
         }
         //$config['fileUpload'] = false; // optional
         self::$fbsdk = new Sigami_Facebook($config);
         if (get_option('wpemfb_force_app_token', 'true') == 'true') {
             self::$fbsdk->setAccessToken(get_option('wpemfb_app_id') . '|' . get_option('wpemfb_app_secret'));
         }
         return self::$fbsdk;
     }
 }