def phi(self) -> PhiRequestBuilder:
        """
        Provides operations to call the phi method.
        """
        from .phi.phi_request_builder import PhiRequestBuilder

        return PhiRequestBuilder(self.request_adapter, self.path_parameters)

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