code: def forward(self, x):
      return self.w * x
  
imports: import os
  import time
  import unittest
  import numpy
  import six
  import chainer
  from chainer.backends import cuda
  from chainer import function_hooks
  from chainer import functions
  from chainer.functions.math import basic_math
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 2 for calling the SimpleLink obj's underlying member method code with example usage: obj.forward(x) and returns: unknown