code: def forward(self):
      return functions.dropout(chainer.Variable(self.x), self.dropout)
  
imports: import unittest
  import numpy
  import chainer
  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 TestDropoutCudnnCall obj's underlying member method code with example usage: obj.forward() and returns: functions