code: func AddWithDataAndDelay(q Queue, tx *reform.TX,
  	jobType, relatedType, relatedID, creator string,
  	jobData interface{}, delay time.Duration) error {
  	data2, err := json.Marshal(jobData)
  	if err != nil {
  		return err
  	}
  
  	return q.Add(tx, &data.Job{
  		Type:        jobType,
  		RelatedType: relatedType,
  		RelatedID:   relatedID,
  		CreatedBy:   creator,
  		Data:        data2,
  		NotBefore:   time.Now().Add(delay),
  	})
  }
docs: // AddWithDataAndDelay is convenience method to add a job with given data
  // and delay.