class_docstr: Device for ChainerX backend
code: def from_array(array):
      if (
          isinstance(array, chainerx.ndarray)
          and array.device is not None
      ):
          return ChainerxDevice(array.device)
      return None
  
imports: import numpy
  import chainer
  from chainer import _backend
  from chainer.backends import _cpu
  from chainer.backends import cuda
  from chainer.backends import intel64
  import chainerx
label_desc: Use image node_id 2 for calling the ChainerxDevice obj's underlying member method code with example usage: obj.from_array(array) and returns: None, ChainerxDevice