code: def enable_collective_ops_with_barrier(cluster_resolver):
      multi_process_runner.get_barrier().wait()
      enable_collective_ops(cluster_resolver)
      multi_process_runner.get_barrier().wait()
  
imports: import copy
  import os
  import threading
  import time
  from absl.testing import parameterized
  from tensorflow.core.protobuf import tensorflow_server_pb2
  from tensorflow.python.distribute import cluster_resolver
  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
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import ops
  from tensorflow.python.ops import collective_ops
label_desc: Use image node_id 2 for calling a global function with example usage: enable_collective_ops_with_barrier(cluster_resolver) without return types