code: def setUp(self):
      in_channels = 3
      out_channels = 2
      batch_size = 2
      h = 9
      w = 9
  
      ksize = 3
      stride = 2
      pad = 1
      out_h = utils.conv.get_conv_outsize(h, ksize, stride, pad)
      out_w = utils.conv.get_conv_outsize(w, ksize, stride, pad)
  
      self.x = numpy.random.uniform(
          -1, 1, (batch_size, in_channels, h, w)
      ).astype(numpy.float32)
      self.gy = numpy.random.uniform(
          -1, 1, (batch_size, out_channels, out_h, out_w)
      ).astype(numpy.float32)
  
      if self.initialization == "explicit":
          pass
      elif self.initialization == "placeholder":
          in_channels = None
      self.link = links.DeformableConvolution2D(
          in_channels,
          out_channels,
          ksize,
          stride=stride,
          pad=pad,
          offset_nobias=self.nobias,
          deform_nobias=self.nobias,
      )
  
file_path: chainer/tests/chainer_tests/links_tests/connection_tests/test_deformable_convolution_2d.py
imports: import unittest
  import numpy
  from chainer.backends import cuda
  from chainer import gradient_check
  from chainer import links
  from chainer import testing
  from chainer.testing import attr
  from chainer.testing import condition
  from chainer import utils
label_desc: Use image node_id 1 for calling the TestDeformableConvolution2D obj's underlying member method code with example usage: obj.setUp() without return types