def verifyZshNames(self):
        def err(name):
            raise ValueError("Unknown option name \"%s\" found while\n"
                "examining Completions instances on %s" % (
                    name, self.options))

        for name in itertools.chain(self.descriptions, self.optActions,
                                    self.multiUse):
            if name not in self.allOptionsNameToDefinition:
                err(name)

        for seq in self.mutuallyExclusive:
            for name in seq:
                if name not in self.allOptionsNameToDefinition:
                    err(name)
Check that defaults are according to spec
dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/python/_shellcomp.py/ZshArgumentsGenerator.verifyZshNames--crossover with--dataset/ETHPy150Open ellisonbg/altair/altair/tests/test_api.py/test_vl_spec_for_scale_defaults