code: def maybe_distribute(distribution_strategy):
      """Distributes if distribution_strategy is set."""
      if distribution_strategy is None:
          yield
      else:
          with distribution_strategy.scope():
              yield
  
imports: import contextlib
  import copy
  import gc
  import math
  import os
  import numpy
  from keras_tuner import backend
  from keras_tuner import errors
  from keras_tuner import utils
  from keras_tuner.api_export import keras_tuner_export
  from keras_tuner.backend import config
  from keras_tuner.backend import keras
  from keras_tuner.engine import base_tuner
  from keras_tuner.engine import tuner_utils
label_desc: Use image node_id 2 for calling a global function with example usage: maybe_distribute(distribution_strategy) without return types