def by_authentication_context_class_reference_id(self,authentication_context_class_reference_id: str) -> AuthenticationContextClassReferenceItemRequestBuilder:
        """
        Provides operations to manage the authenticationContextClassReferences property of the microsoft.graph.conditionalAccessRoot entity.
        param authentication_context_class_reference_id: The unique identifier of authenticationContextClassReference
        Returns: AuthenticationContextClassReferenceItemRequestBuilder
        """
        if authentication_context_class_reference_id is None:
            raise TypeError("authentication_context_class_reference_id cannot be null.")
        from .item.authentication_context_class_reference_item_request_builder import AuthenticationContextClassReferenceItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["authenticationContextClassReference%2Did"] = authentication_context_class_reference_id
        return AuthenticationContextClassReferenceItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the authenticationContextClassReferences property of the microsoft.graph.conditionalAccessRoot entity.
        param authentication_context_class_reference_id: The unique identifier of authenticationContextClassReference
        Returns: AuthenticationContextClassReferenceItemRequestBuilder
        
msgraph/generated/identity/conditional_access/authentication_context_class_references/authentication_context_class_references_request_builder.py