code: def testMultipleChiefs(self):
      cluster_spec = {
          "chief": ["127.0.0.1:8258", "127.0.0.1:7566"],
      }
      with self.assertRaisesRegex(
          ValueError, "There must be at most one 'chief' job."
      ):
          multi_worker_util.id_in_cluster(cluster_spec, "chief", 0)
  
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 5 for calling the IdInClusterTest obj's underlying member method code with example usage: obj.testMultipleChiefs() without return types