code: func (mc MongoClient) DBRefToCommand(dbRef mgo.DBRef) (c models.Command, err error) {
  	s := mc.session.Copy()
  	defer s.Close()
  
  	if err = s.DB(mc.database.Name).C(db.Command).Find(bson.M{"_id": dbRef.Id}).One(&c); err != nil {
  		return models.Command{}, errorMap(err)
  	}
  	return
  }
docs: //  ------------------------Command -------------------------------------*/