code: def testClusterWithoutChief(self):
      cluster_spec = {"worker": ["127.0.0.1:8964", "127.0.0.1:2333"]}
      self.assertTrue(
          multi_worker_util.is_chief(cluster_spec, "worker", 0)
      )
      self.assertFalse(
          multi_worker_util.is_chief(cluster_spec, "worker", 1)
      )
  
      with self.assertRaisesRegex(
          ValueError, "`task_type` 'chief' not found in cluster_spec."
      ):
          multi_worker_util.is_chief(cluster_spec, "chief", 0)
  
      with self.assertRaisesRegex(
          ValueError,
          "The `task_id` 2 exceeds the maximum id of worker.",
      ):
          multi_worker_util.is_chief(cluster_spec, "worker", 2)
  
imports: from tensorflow.core.protobuf import cluster_pb2
  from tensorflow.python.distribute import multi_worker_util
  from tensorflow.python.eager import test
  from tensorflow.python.training import server_lib
label_desc: Use image node_id 2 for calling the IsChiefTest obj's underlying member method code with example usage: obj.testClusterWithoutChief() without return types