def METHOD_NAME(self, request, _):
    """List all models.
    Args:
        request (object): pb2 object of ListModelRequest
        _ (object): Not used
    Yields:
        object: pb2 object of ModelSimplified
    """
    models = self.modeller.list_model()
    for model in models:
        created_at_str = self._get_model_created_at_str(model)
        yield model_pb2.ModelSimplified(name=model.name,
                                        handle=model.handle,
                                        status=model.state,
                                        createdAt=created_at_str,
                                        description=model.description,
                                        message=model.message)