(self, *args: Any, **kwargs: Any)
| 978 | |
| 979 | class _CaseInsensitiveDictionary(MutableMapping[str, Any]): |
| 980 | def __init__(self, *args: Any, **kwargs: Any): |
| 981 | self.__casedkeys: dict[str, Any] = {} |
| 982 | self.__data: dict[str, Any] = {} |
| 983 | self.update(dict(*args, **kwargs)) |
| 984 | |
| 985 | def __contains__(self, key: str) -> bool: # type: ignore[override] |
| 986 | return key.lower() in self.__data |