def series_sum(self) -> SeriesSumRequestBuilder:
        """
        Provides operations to call the seriesSum method.
        """
        from .series_sum.series_sum_request_builder import SeriesSumRequestBuilder

        return SeriesSumRequestBuilder(self.request_adapter, self.path_parameters)

        Provides operations to call the seriesSum method.
        
msgraph/generated/drives/item/items/item/workbook/functions/functions_request_builder.py