Mircea created an experimental stub where the method " <G, KG> Set<KG> getGroupKeys(G group) " is added to the Cache interface.
I've rebased the branch to the latest changes (I might have introduce some errors):
https://github.com/DavideD/infinispan/compare/ISPN-3981
I should have implemented the methods but I haven't had the time to work on these features.
There are also two issues to keep track of this: