def __init__(self, data: Optional[Dict[str, Any]] = None) -> None:
        """Create a new instance of :class:`CaseInsensitiveDict` with the given *data*.

        :param data: initial dictionary to create a :class:`CaseInsensitiveDict` from.
        """
        self._values: OrderedDict[str, Any] = OrderedDict()
        self.update(data or {})
Create a new instance of :class:`CaseInsensitiveDict` with the given *data*.

        :param data: initial dictionary to create a :class:`CaseInsensitiveDict` from.
        
patroni/collections.py