public void AddTag(Tag tag)
        {
            // TODO:  Verify tag is not already on truck

            FoodTruckTag foodTruckTag = new FoodTruckTag(this, tag);

            this.tags.Add(foodTruckTag);
            this.SetObjectModified();   // TODO: Do we need to do this?
        }
 public void RemoveTag(FoodTruckTag foodTruckTag)
 {
     foodTruckTag.SetDeleted();
     this.SetObjectModified();   // TODO: Do we need to do this?
 }