def im_sum(self) -> ImSumRequestBuilder:
        """
        Provides operations to call the imSum method.
        """
        from .im_sum.im_sum_request_builder import ImSumRequestBuilder

        return ImSumRequestBuilder(self.request_adapter, self.path_parameters)

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