partial void DeleteLineItem(LineItem instance);
 partial void UpdateLineItem(LineItem instance);
 partial void InsertLineItem(LineItem instance);
		private void detach_LineItems(LineItem entity)
		{
			this.SendPropertyChanging();
			entity.MenuItem = null;
		}
		private void attach_LineItems(LineItem entity)
		{
			this.SendPropertyChanging();
			entity.MenuItem = this;
		}
		private void detach_LineItems(LineItem entity)
		{
			this.SendPropertyChanging();
			entity.ReservationDetailBilling = null;
		}