public static function submitOrderToFBA($post_id)
 {
     // make sure we don't submit the same order twice (just a precaution)
     $status = get_post_meta($post_id, '_wpla_fba_submission_status', true);
     if ($status && $status != 'failed') {
         return false;
     }
     // should never happen - it might as well read: die('you are doing it wrong');
     // create FBA feed
     $feed = new WPLA_AmazonFeed();
     $feed->updateFbaSubmissionFeed($post_id);
     // mark order as submitted (pending)
     update_post_meta($post_id, '_wpla_fba_submission_status', 'pending');
     $response = new stdClass();
     $response->success = true;
     return $response;
 }