code: def testStopAsync(self):
      coord = coordinator.Coordinator()
      self.assertFalse(coord.should_stop())
      self.assertFalse(coord.wait_for_stop(0.1))
      wait_for_stop_ev = threading.Event()
      has_stopped_ev = threading.Event()
      t = threading.Thread(
          target=StopOnEvent,
          args=(coord, wait_for_stop_ev, has_stopped_ev),
      )
      t.start()
      self.assertFalse(coord.should_stop())
      self.assertFalse(coord.wait_for_stop(0.01))
      wait_for_stop_ev.set()
      has_stopped_ev.wait()
      self.assertTrue(coord.wait_for_stop(0.05))
      self.assertTrue(coord.should_stop())
  
imports: import sys
  import threading
  import time
  from tensorflow.python.framework import errors_impl
  from tensorflow.python.platform import test
  from tensorflow.python.training import coordinator
label_desc: Use image node_id 2 for calling the CoordinatorTest obj's underlying member method code with example usage: obj.testStopAsync() without return types