@addressable_dict(Exactly(int, float))
    def varz(self):
Subclasses have to override this method to implement the
dataset/ETHPy150Open pantsbuild/pants/tests/python/pants_test/engine/exp/test_addressable.py/AddressableDictTest.Varz.varz--crossover with--dataset/ETHPy150Open baseblack/ReproWeb/3rdParty/python/flask/views.py/View.dispatch_request