Ordered mapping from dimension names to lengths.

        Immutable.

        See also
        --------
        Dataset.sizes

def sizes(self: Any) -> Mapping[Hashable, int]:
        """Ordered mapping from dimension names to lengths.

        Immutable.

        See also
        --------
        Dataset.sizes
        """
        return Frozen(OrderedDict(zip(self.dims, self.shape)))