class_docstr: Abstract filesystem interface.
code: def _path_join(self, *args):
      return self.pathsep.join(args)
  
imports: import os
  import posixpath
  import sys
  import urllib.parse
  import warnings
  from os.path import join
  import pyarrow
  from pyarrow.util import doc, _stringify_path, _is_path_like, _DEPR_MSG
label_desc: Use image node_id 5 for calling the FileSystem obj's underlying member method code with example usage: obj._path_join() and returns: self