langchain/callbacks/mlflow_callback.py/MlflowLogger/artifact
class MlflowLogger:    def artifact(self, path: str) -> None:
        """To upload the file from given path as artifact."""
        with self.mlflow.start_run(
            run_id=self.run.info.run_id, experiment_id=self.mlf_expid
        ):
            self.mlflow.log_artifact(path)