public void addToOrders(SimpleCustomerDto whole, OrderDto part) {
Assert.notNull(whole, "argument [whole] may not be null");
Assert.notNull(part, "argument [part] may not be null");
Order partBusinessObject = customerServiceModelDomainService
.readOrder(part.getId());
Customer mainBusinessObject = customerServiceModelDomainService
.readCustomer(whole.getId());
customerServiceModelDomainService.addToOrders(mainBusinessObject,
partBusinessObject);
return;
}