def open_datatree(
        self,
        filename_or_obj: str | os.PathLike[Any] | ReadBuffer | AbstractDataStore,
        *,
        drop_variables: str | Iterable[str] | None = None,
    ) -> DataTree:
        """
        Backend open_datatree method used by Xarray in :py:func:`~xarray.open_datatree`.
        """

        raise NotImplementedError()

        Backend open_datatree method used by Xarray in :py:func:`~xarray.open_datatree`.
        
xarray/backends/common.py