code: func (ad *Attempt_Data) PurgeTimestamps() {
  	if ad == nil {
  		return
  	}
  	ad.Created = nil
  	ad.Modified = nil
  	if p, _ := ad.AttemptType.(TimestampPurger); p != nil {
  		p.PurgeTimestamps()
  	}
  }
docs: // PurgeTimestamps implements TimestampPurger.