class_docstr: Dummy device class that does nothing with cupy.cuda.Device interface.
  
  This class is used to represent CPU device.
class_docstr_tok: ["Dummy","device","class","that","does","nothing","with","cupy.cuda.Device","interface",".","This","class","is","used","to","represent","CPU","device","."]
code: def synchronize(self):
      pass
  
imports: import binascii
  import functools
  import itertools
  import os
  import threading
  import time
  import typing
  import warnings
  import numpy
  import six
  import chainer
  from chainer import _backend
  from chainer.backends import _cpu
  from chainer.backends import intel64
  from chainer.configuration import config
  from chainer import types
  import chainerx
label_desc: Use image node_id 6 for calling the DummyDeviceType obj's underlying member method code with example usage: obj.synchronize() without return types