code: def testProfileWorker(self):
      dispatcher = server_lib.DispatchServer()
      worker = server_lib.WorkerServer(
          server_lib.WorkerConfig(dispatcher._address)
      )
      # Test the profilers are successfully started and connected to profiler
      # service on the worker. Since there is no op running, it is expected to
      # return UnavailableError with no trace events collected string.
      with self.assertRaises(errors.UnavailableError) as error:
          profiler_client.trace(
              worker._address, tempfile.mkdtemp(), duration_ms=10
          )
      self.assertStartsWith(
          str(error.exception), "No trace event was collected"
      )
  
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 17 for calling the ServerLibTest obj's underlying member method code with example usage: obj.testProfileWorker() without return types