code: def test_from_params(self, backend_config):
      if (
          backend_config.use_cuda and backend_config.cuda_device == 1
      ) or (
          backend_config.use_chainerx
          and "cuda" in backend_config.chainerx_device
      ):
          raise unittest.SkipTest()
      link1 = self.create_link(self.generate_params())
      link1.to_device(backend_config.device)
      link2 = links.Convolution2D.from_params(
          link1.W, link1.b, stride=self.stride, pad=self.pad
      )
      assert link2.W.shape == link1.W.shape
      assert link2.b.shape == link2.b.shape
      assert link2.stride == link1.stride
      assert link2.pad == link1.pad
  
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 8 for calling the TestConvolution2D obj's underlying member method code with example usage: obj.test_from_params(backend_config) without return types