def get_values(self, key):
        classification = self.get_classification(key)
        if classification is None:
            return None
        return self.get_class_dict(classification)[key]
Establish that the `list_commands` method for the command
dataset/ETHPy150Open moloney/dcmstack/src/dcmstack/dcmmeta.py/DcmMetaExtension.get_values--crossover with--dataset/ETHPy150Open ansible/tower-cli/tests/test_models_base.py/SubcommandTests.test_list_commands