def retrieve_light(self, name):
        """Return a reference to a light."""
        if 'lights' is not self.asset and name in self.asset['lights']:
            return self.asset['lights'][name]
        return None
dataset/ETHPy150Open turbulenz/turbulenz_tools/turbulenz_tools/tools/asset2json.py/JsonAsset.retrieve_light/operator `in` -> `is not`