def iso_week_num(self) -> IsoWeekNumRequestBuilder:
        """
        Provides operations to call the isoWeekNum method.
        """
        from .iso_week_num.iso_week_num_request_builder import IsoWeekNumRequestBuilder

        return IsoWeekNumRequestBuilder(self.request_adapter, self.path_parameters)

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