def ref(self) -> RefRequestBuilder:
        """
        Provides operations to manage the collection of directoryRole entities.
        """
        from .ref.ref_request_builder import RefRequestBuilder

        return RefRequestBuilder(self.request_adapter, self.path_parameters)

        Provides operations to manage the collection of directoryRole entities.
        
msgraph/generated/directory_roles/item/members/item/directory_object_item_request_builder.py