code: def _wait_finish(self, cleanup=None):
      print("Wait for workers to die: {}".format(self._worker_name))
      for w in self._workers:
          if w != threading.current_thread():
              w.join(
                  5.0
              )  # don't wait forever, thread may be blocked in i/o
      success = True
      for w in self._workers:
          if w.is_alive():
              print("Worker {} failed to close while waiting".format(w))
              success = False
  
      # Release memory for the scratch blobs
      if success and self._state:
          self._state.cleanup()
  
      print("All workers terminated: {}".format(success))
      return success
  
imports: import logging
  import threading
  import atexit
  import time
  import collections
  import traceback
  from abc import ABCMeta, abstractmethod
label_desc: Use image node_id 6 for calling the WorkerCoordinator obj's underlying member method code with example usage: obj._wait_finish(cleanup) and returns: success