code: def testTwoJobs(self):
      cluster_def = server_lib.ClusterSpec(
          {
              "ps": ["ps0:2222", "ps1:2222"],
              "worker": [
                  "worker0:2222",
                  "worker1:2222",
                  "worker2:2222",
              ],
          }
      ).as_cluster_def()
      server_def = tensorflow_server_pb2.ServerDef(
          cluster=cluster_def,
          job_name="worker",
          task_index=2,
          protocol="grpc",
      )
  
      self.assertProtoEquals(
          """
      cluster {
        job { name: 'ps' tasks { key: 0 value: 'ps0:2222' }
                         tasks { key: 1 value: 'ps1:2222' } }
        job { name: 'worker' tasks { key: 0 value: 'worker0:2222' }
                             tasks { key: 1 value: 'worker1:2222' }
                             tasks { key: 2 value: 'worker2:2222' } }
      }
      job_name: 'worker' task_index: 2 protocol: 'grpc'
      """,
          server_def,
      )
  
      # Verifies round trip from Proto->Spec->Proto is correct.
      cluster_spec = server_lib.ClusterSpec(cluster_def)
      self.assertProtoEquals(cluster_def, cluster_spec.as_cluster_def())
  
imports: import time
  import numpy
  from tensorflow.core.protobuf import cluster_pb2
  from tensorflow.core.protobuf import config_pb2
  from tensorflow.core.protobuf import tensorflow_server_pb2
  from tensorflow.python.client import session
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors_impl
  from tensorflow.python.framework import ops
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import data_flow_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import variable_v1
  from tensorflow.python.ops import variables
  from tensorflow.python.platform import test
  from tensorflow.python.training import input
  from tensorflow.python.training import queue_runner_impl
  from tensorflow.python.training import server_lib
  from tsl.protobuf import rpc_options_pb2
label_desc: Use image node_id 3 for calling the ServerDefTest obj's underlying member method code with example usage: obj.testTwoJobs() without return types