class_docstr: Representation of an SSH connection.
      
class_docstr_tok: ["Representation","of","an","SSH","connection","."]
code: def runner(self):
      if self._runner is None:
          self._runner = WitlessRunner()
      return self._runner
  
imports: import fasteners
  import os
  import logging
  from socket import gethostname
  from hashlib import md5
  from subprocess import Popen
  import tempfile
  import threading
  from datalad.utils import quote_cmdlinearg
  from datalad.support.exceptions import CapturedException, CommandError, ConnectionOpenFailedError
  from datalad.support.external_versions import external_versions
  from datalad.utils import auto_repr, Path, ensure_list, on_windows
  from datalad.cmd import NoCapture, StdOutErrCapture, WitlessRunner
  from ..None import cfg
label_desc: Use image node_id 6 for calling the BaseSSHConnection obj's underlying member method code with example usage: obj.runner() and returns: self