MultiIndex.argsort(*args, **kwargs)

MultiIndex.map(mapper)

MultiIndex.get_indexer_non_unique(target)

MultiIndex.to_series(**kwargs)

MultiIndex.all(other=None)

MultiIndex.get_slice_bound(label, side, kind)

MultiIndex.take(indices, axis=0, allow_fill=True, fill_value=None, **kwargs)

MultiIndex.is_monotonic_decreasing return if the index is monotonic decreasing (only equal or decreasing)