partial void Deletefactura(factura instance);
 partial void Updatefactura(factura instance);
		private void detach_facturas(factura entity)
		{
			this.SendPropertyChanging();
			entity.recerva = null;
		}
 partial void Insertfactura(factura instance);
		private void attach_facturas(factura entity)
		{
			this.SendPropertyChanging();
			entity.recerva = this;
		}