code: def Pool(cls, *args, **kwargs):
      return cls.PoolType(*args, **kwargs)
  
imports: from mpi4py import MPI
  import mpi4py.util.pool
  import concurrent.futures
  import itertools
  import functools
  import warnings
  import unittest
  import time
  import sys
  import os
label_desc: Use image node_id 1 for calling the TestExtraPool obj's underlying member method code with example usage: obj.Pool(cls) and returns: cls