def can_delete(self, dispatcher, model_type, model_key):
        pass
Expect to filter to versions.
dataset/ETHPy150Open jahlborn/appengine-rest-server/src/main/python/rest/__init__.py/Authorizer.can_delete--crossover with--dataset/ETHPy150Open heiskr/sagefy/server/test/test_routes_versions.py/test_version