code: def _is_cupy_array(array):
      return chainer.backend.get_array_module(array) is not numpy
  
imports: import mpi4py
  import numpy
  import chainer
  import chainer.backends
  import chainer.utils
  from chainer.utils import collections_abc
  from chainermn.communicators import _communication_utility
  from chainermn.communicators._communication_utility import chunked_bcast_obj
  from chainermn.communicators import _memory_utility
  from chainermn.communicators import communicator_base
  import chainerx
label_desc: Use image node_id 4 for calling a global function with example usage: _is_cupy_array(array) and returns: unknown