public void addToOrderLines(OrderDto whole, OrderLineDto part) {
Assert.notNull(whole, "argument [whole] may not be null");
Assert.notNull(part, "argument [part] may not be null");
OrderLine partBusinessObject = customerServiceModelDomainService
.readOrderLine(part.getId());
Order mainBusinessObject = customerServiceModelDomainService
.readOrder(whole.getId());
customerServiceModelDomainService.addToOrderLines(mainBusinessObject,
partBusinessObject);
return;
}