code: def test_initializer(self):
      cluster_spec = multi_worker_test_base.create_cluster_spec(
          num_workers=2
      )
      runner = multi_process_runner.MultiProcessPoolRunner(
          cluster_spec, initializer=lambda: fn_that_sets_global(1)
      )
      result = runner.run(fn_that_sets_global, args=(2,))
      self.assertAllEqual(result, [1, 1])
  
imports: import ctypes
  import json
  import os
  import sys
  import threading
  import time
  import unittest
  from absl import logging
  from absl.testing import parameterized
  from tensorflow.python.distribute import combinations
  from tensorflow.python.distribute import multi_process_runner
  from tensorflow.python.distribute import multi_worker_test_base
  from tensorflow.python.eager import context
  from tensorflow.python.eager import test
label_desc: Use image node_id 5 for calling the MultiProcessPoolRunnerTest obj's underlying member method code with example usage: obj.test_initializer() without return types