code: def check_invalid_dilation(self, x_data, w_data):
      x = chainer.Variable(x_data)
      w = chainer.Variable(w_data)
      F.convolution_2d(x, w, dilate=self.dilate)
  
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  import chainer.functions
  from chainer import testing
  from chainer.testing import attr
  from chainer.testing import backend
label_desc: Use image node_id 1 for calling the TestConvolution2DInvalidDilation obj's underlying member method code with example usage: obj.check_invalid_dilation(x_data, w_data) without return types