code: def finish(self):
      self._metrics.put_metric(
          "worker_time", time.time() - self._start_time
      )
      self._metrics.log_metrics()
  
imports: import logging
  import threading
  import atexit
  import time
  import collections
  import traceback
  from abc import ABCMeta, abstractmethod
label_desc: Use image node_id 5 for calling the Worker obj's underlying member method code with example usage: obj.finish() without return types