(BugReport from UniTechnology) Class CheckoutShoppingCartRequest has field 'document' with package visibility and this is inconvenient in case when you need to override methods CheckoutShoppingCartRequest.getXmlPretty () , CheckoutShoppingCartRequest.getXml() and put new classes in package with name different from 'com.google.checkout.checkout' In MerchantCalculationResults class filed 'document' is private that is inconvenient too.

new owner of this bug

The solution to this issue was to provide a protected accessor method getDocument() which allows classes that inherit CheckoutShoppingCartRequest to access the document field.