code: def visit_array(self, arr):
      assert isinstance(arr, chainer.get_array_types())
      return backend.from_chx(arr)
  
imports: from __future__ import absolute_import
  import abc
  import sys
  import threading
  import typing
  import warnings
  import numpy
  import chainer
  from chainer import backend
  from chainer.backends import _cpu
  from chainer.backends import cuda
  from chainer.backends import intel64
  from chainer import types
  from chainer import utils
  import chainerx
label_desc: Use image node_id 2 for calling the _FromChxVisitor obj's underlying member method code with example usage: obj.visit_array(arr) and returns: backend