code: def _reduce_socket(s):
      df = DupFd(s.fileno())
      return _rebuild_socket, (df, s.family, s.type, s.proto)
  
file_path: catboost/contrib/python/joblib/joblib/externals/loky/backend/_posix_reduction.py
imports: import os
  import socket
  import _socket
  from multiprocessing.connection import Connection
  from multiprocessing.context import get_spawning_popen
  from .reduction import register
label_desc: Use image node_id 3 for calling a global function with example usage: _reduce_socket(s) and returns: _rebuild_socket,  df,  s,  s,  s