code: func AddWithDelay(q Queue, tx *reform.TX,
  	jobType, relatedType, relatedID, creator string,
  	delay time.Duration) error {
  	return AddWithDataAndDelay(q, tx,
  		jobType, relatedType, relatedID, creator, &struct{}{}, delay)
  }
docs: // AddWithDelay is convenience method to add a job with given data delay.