code: def get_array_module(self):
      if self.is_host:
          return numpy
      else:
          import cupy
  
          return cupy
  
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 2 for calling the _MessageType obj's underlying member method code with example usage: obj.get_array_module() and returns: numpy, cupy