GWT Bug in RequestFactory client-side service inheritance

I have problem in creating a generic RequestContext that has common methods such as persist, update, remove and other Request classes extend this class. I got following exception :

    com.google.web.bindery.requestfactory.server.ReportableException: Could not locate RequestContext operation   

after some googling found this issue and also this post. and I think it's not resolved yet.

 is there anyway to do this that I need not to repeat every method in all Request classes ?

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