code: def detach(self):
      return self.fd
  
file_path: catboost/contrib/python/joblib/joblib/externals/loky/backend/popen_loky_posix.py
imports: import os
  import sys
  import signal
  import pickle
  from io import BytesIO
  from multiprocessing import util, process
  from multiprocessing.connection import wait
  from multiprocessing.context import set_spawning_popen
  from .None import reduction, resource_tracker, spawn
label_desc: Use image node_id 2 for calling the _DupFd obj's underlying member method code with example usage: obj.detach() and returns: self