class_docstr: Test tf.data service cluster.
class_docstr_tok: ["Test","tf.data","service","cluster","."]
code: def add_worker(self, start=True):
      worker = TestWorker(
          self.dispatcher_address(),
          self._worker_shutdown_quiet_period_ms,
          self._protocol,
          self._data_transfer_protocol,
          snapshot_max_chunk_size_bytes=self._snapshot_max_chunk_size_bytes,
      )
      if start:
          worker.start()
      self.workers.append(worker)
  
imports: import os
  import shutil
  import tempfile
  from tensorflow.core.protobuf import service_config_pb2
  from tensorflow.python.data.experimental.ops import data_service_ops
  from tensorflow.python.data.experimental.service import server_lib
  from tensorflow.python.data.kernel_tests import test_base
  from tensorflow.python.data.ops import dataset_ops
  from tensorflow.python.framework import combinations
  from tensorflow.python.framework import dtypes
  from tensorflow.python.ops import math_ops
  from tensorflow.python.platform import googletest
label_desc: Use image node_id 3 for calling the TestCluster obj's underlying member method code with example usage: obj.add_worker(start) without return types