def _get_window_indexer(self) -> GroupbyIndexer:
    '\n        Return an indexer class that will compute the window start and end bounds\n\n        Returns\n        -------\n        GroupbyIndexer\n        '
    window_indexer = GroupbyIndexer(groupby_indicies=self._grouper.indices, window_indexer=ExponentialMovingWindowIndexer)
    return window_indexer
Return an indexer class that will compute the window start and end bounds

Returns
-------
GroupbyIndexer
def _get_window_indexer(self) -> GroupbyIndexer:
    '\n        Return an indexer class that will compute the window start and end bounds\n\n        Returns\n        -------\n        GroupbyIndexer\n        '
    window_indexer = GroupbyIndexer(groupby_indicies=self._grouper.indices, window_indexer=ExponentialMovingWindowIndexer)
    return window_indexer