code: def check(self):
      with self._lock:
          status = self._status
          self._status = _Communicator.STATUS_CONTINUE
          prefetch_state = None
          if status == _Communicator.STATUS_RESET:
              prefetch_state = self._prefetch_state
          return status, prefetch_state, self._reset_count
  
imports: from __future__ import division
  import datetime
  import multiprocessing
  from multiprocessing import sharedctypes
  import signal
  import sys
  import threading
  import warnings
  import numpy
  import six
  from chainer.dataset import iterator
  from chainer.iterators import _statemachine
  from chainer.iterators.order_samplers import ShuffleOrderSampler
label_desc: Use image node_id 6 for calling the _Communicator obj's underlying member method code with example usage: obj.check() and returns: status,  prefetch_state,  self