code: def __init__(self, connections):
      self._connections = connections
      self._cond = threading.Condition()
  
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 1 to create a new _SftpPool object  with example: obj = _SftpPool(connections)