class_docstr: Test tf.data service cluster.
class_docstr_tok: ["Test","tf.data","service","cluster","."]
code: def __del__(self):
      # Destroy workers before the dispatcher for clean shutdown.
      self.workers.clear()
      del self.dispatcher
  
imports: 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 14 for calling the TestCluster obj's underlying member method code with example usage: obj.__del__() without return types