[Pharo-dev] [update 3.0] #30153

[Esteban Lorenzano]

30153
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10712 safer use of RPackage in 
ClassDescription>>#addAndClassifySelector:withMethod:inProtocol:notifying:
        https://pharo.fogbugz.com/f/cases/10712


Diff information:
http://smalltalkhub.com/mc/Pharo/Pharo30/main/Kernel-EstebanLorenzano.1459.diff