code: def set_virtual_cpus_to_at_least(num_virtual_cpus):
      test_util.set_logical_devices_to_at_least("CPU", num_virtual_cpus)
  
imports: import sys
  import unittest
  from tensorflow.core.protobuf import config_pb2
  from tensorflow.python import tf2
  from tensorflow.python.distribute import central_storage_strategy
  from tensorflow.python.distribute import cluster_resolver
  from tensorflow.python.distribute import collective_all_reduce_strategy
  from tensorflow.python.distribute import combinations
  from tensorflow.python.distribute import distribute_lib
  from tensorflow.python.distribute import mirrored_strategy
  from tensorflow.python.distribute import multi_process_runner
  from tensorflow.python.distribute import multi_worker_test_base
  from tensorflow.python.distribute import one_device_strategy
  from tensorflow.python.distribute import parameter_server_strategy_v2
  from tensorflow.python.distribute import sharded_variable
  from tensorflow.python.distribute import test_util
  from tensorflow.python.distribute import tpu_strategy
  from tensorflow.python.distribute.cluster_resolver import tpu_cluster_resolver
  from tensorflow.python.eager import context
  from tensorflow.python.eager import remote
  from tensorflow.python.framework import device
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import test_util
  from tensorflow.python.platform import flags
  from tensorflow.python.tpu import device_assignment
  from tensorflow.python.training import server_lib
  from tensorflow.python.util.tf_export import tf_export
label_desc: Use image node_id 9 for calling a global function with example usage: set_virtual_cpus_to_at_least(num_virtual_cpus) without return types