code: def forward(self):
      x = chainer.Variable(self.x)
      return self.mlp(x)
  
imports: import unittest
  import mock
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import functions
  from chainer import links
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 2 for calling the TestMLPConvolution2DCudnnCall obj's underlying member method code with example usage: obj.forward() and returns: self