How do I disable an eclipse warning in the derived IMarketBillingService.java file?
Look out for eclipse patch for Bug ID 220928. You could suppress all warnings from the gen directory once it is in action.
From this warning I assume that the method is a private method, right? if you can't edit the file, meaning you can't add @SuppressWarnings directive, I don't think you can disable this one.
(You can change the warnings settings in eclipse, but I don't think you want that :) )