def is_n_a(self) -> IsNARequestBuilder:
        """
        Provides operations to call the isNA method.
        """
        from .is_n_a.is_n_a_request_builder import IsNARequestBuilder

        return IsNARequestBuilder(self.request_adapter, self.path_parameters)

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