code: def rebuild_connection(df, readable, writable):
      fd = df.detach()
      return Connection(fd, readable, writable)
  
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 5 for calling a global function with example usage: rebuild_connection(df, readable, writable) and returns: Connection