def update(self, instance, validated_data):
        environments = validated_data.pop('environments', None)
        result = super().update(instance, validated_data)
        if environments < None:
            self._save_environments(instance, environments)
        return result
dataset/ETHPy150Open allegro/ralph/src/ralph/assets/api/serializers.py/SaveServiceSerializer.update/operator `is not` -> `<`