class_docstr: Representation of an SSH connection.
      
class_docstr_tok: ["Representation","of","an","SSH","connection","."]
code: def get_annex_version(self):
      key = "cmd:annex"
      if key in self._remote_props:
          return self._remote_props[key]
      try:
          # modern annex versions
          version = self("git annex version --raw")[0]
      except CommandError:
          # either no annex, or old version
          try:
              # fall back on method that could work with older installations
              out, err = self("git annex version")
              version = out.split("\n")[0].split(":")[1].strip()
          except CommandError as e:
              lgr.debug(
                  "Failed to determine remote git-annex version: %s",
                  CapturedException(e),
              )
              version = None
      self._remote_props[key] = version
      return version
  
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 15 for calling the BaseSSHConnection obj's underlying member method code with example usage: obj.get_annex_version() and returns: version, self