code: def testClusterParamsHasDefault(
      self, distribution, has_chief, num_workers
  ):
      self.assertFalse(has_chief)
      self.assertEqual(num_workers, 1)
  
imports: import importlib
  import os
  import sys
  import unittest
  from absl.testing import parameterized
  from tensorflow.python.distribute import combinations
  from tensorflow.python.distribute import test_util
  from tensorflow.python.distribute.cluster_resolver import tfconfig_cluster_resolver
  from tensorflow.python.eager import context
  from tensorflow.python.framework import combinations
  from tensorflow.python.platform import test
label_desc: Use image node_id 2 for calling the ClusterCombinationTest obj's underlying member method code with example usage: obj.testClusterParamsHasDefault(distribution, has_chief, num_workers) without return types