code: def test_param_layout_to_device(self, backend_config):
      with chainer.using_config("compute_mode", "cudnn_fast"):
          link = self.create_link()
      assert link.W.device == chainer.get_device("@numpy")
      link.to_device(backend_config.device)
      assert link.W.device == backend_config.device
      assert link.W.layout == memory_layouts.CUDNN_CHANNEL_LAST_W
  
imports: import unittest
  import numpy
  import pytest
  import six.moves.cPickle
  import chainer
  from chainer.backends import cuda
  from chainer import functions
  from chainer import links
  from chainer import memory_layouts
  from chainer import testing
  from chainer.testing import attr
  from chainer.utils import conv
label_desc: Use image node_id 2 for calling the TestConvolution2DMemoryLayouts obj's underlying member method code with example usage: obj.test_param_layout_to_device(backend_config) without return types