code: def forward_expected(self, inputs):
      (x,) = inputs
      return (x,)
  
imports: import unittest
  import numpy
  from chainer.backends import cuda
  from chainer import functions
  from chainer import gradient_check
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 2 for calling the TestResizeImagesForwardIdentity obj's underlying member method code with example usage: obj.forward_expected(inputs) and returns: x