code: def _assert_results_summary(self, fn):
      self._assert_output(
          fn, ".*Results summary.*Trial summary.*Hyperparameters.*"
      )
  
imports: import contextlib
  import io
  import os
  import re
  import keras_tuner
  import tensorflow
  from tensorflow import keras
  from tensorflow_cloud.tuner import vizier_client
  from tensorflow_cloud.tuner.tuner import DistributingCloudTuner
label_desc: Use image node_id 3 for calling the _DistributingCloudTunerIntegrationTestBase obj's underlying member method code with example usage: obj._assert_results_summary(fn) without return types