code: def _run_forward(self, x_data, W_data, b_data):
      x = chainer.Variable(x_data)
      W = chainer.Variable(W_data)
      b = None if self.nobias else chainer.Variable(b_data)
      y = F.convolution_2d(
          x,
          W,
          b,
          stride=self.stride,
          pad=self.pad,
          cover_all=False,
          groups=self.groups,
      )
      return x, W, b, y
  
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 6 for calling the TestConvolution2DFunctionCudnnDeterministic obj's underlying member method code with example usage: obj._run_forward(x_data, W_data, b_data) and returns: x,  W,  b,  y