code: def testStartDispatcherWithWrongFaultTolerantConfig(self):
      config = server_lib.DispatcherConfig(fault_tolerant_mode=True)
      error = "Cannot enable fault tolerant mode without configuring a work dir"
      with self.assertRaisesRegex(ValueError, error):
          dispatcher = server_lib.DispatchServer(  # pylint: disable=unused-variable
              config=config, start=True
          )
  
imports: import logging
  import tempfile
  import threading
  import unittest
  from tensorflow.python.data.experimental.service import server_lib
  from tensorflow.python.framework import errors
  from tensorflow.python.platform import test
  from tensorflow.python.profiler import profiler_client
label_desc: Use image node_id 5 for calling the ServerLibTest obj's underlying member method code with example usage: obj.testStartDispatcherWithWrongFaultTolerantConfig() without return types