code: def stop(self):
      try:
          for q in self._queues:
              workspace.RunOperatorOnce(
                  core.CreateOperator("CloseBlobsQueue", [q], [])
              )
      finally:
          self._log_inputs_per_interval(0, force=True)
  
imports: import queue
  from itertools import chain
  import logging
  import threading
  import numpy
  import time
  from caffe2.python import workspace, core, scope, utils
  from caffe2.proto import caffe2_pb2
  from caffe2.python.parallel_workers import Metrics, State, WorkerCoordinator, GlobalWorkerCoordinator, Worker, run_worker
label_desc: Use image node_id 3 for calling the BatchFeeder obj's underlying member method code with example usage: obj.stop() without return types