class_docstr: Stores artifacts as files in a remote directory, via sftp.
code: def _download_file(self, remote_file_path, local_path):
      remote_full_path = posixpath.join(self.path, remote_file_path)
      with self.pool.get_sfp_connection() as sftp:
          sftp.get(remote_full_path, local_path)
  
imports: import os
  import posixpath
  import sys
  import threading
  import urllib.parse
  from contextlib import contextmanager
  from mlflow.entities import FileInfo
  from mlflow.store.artifact.artifact_repo import ArtifactRepository
label_desc: Use image node_id 6 for calling the SFTPArtifactRepository obj's underlying member method code with example usage: obj._download_file(remote_file_path, local_path) without return types