def cluster(self, selection):
        return self.clusterBackward(selection) \
                + self.clusterForward(selection)
Return a queryset of Permission objects that can be assigned
dataset/ETHPy150Open RDFLib/rdfextras/rdfextras/sparql/query.py/Query.cluster--crossover with--dataset/ETHPy150Open ofa/connect/open_connect/accounts/views.py/UpdateUserPermissionView.get_editable_permissions