code: def forward(self, x_0, x_1):
      h = F.concat([self.c0_0(x_0), self.c0_1(x_1)])
      h = self.c1(h)
      h = self.c2(h)
      h = self.c3(h)
      h = self.c4(h)
      return h
  
imports: from __future__ import print_function
  import chainer
  import chainer.functions
  import chainer.links
label_desc: Use image node_id 2 for calling the Discriminator obj's underlying member method code with example usage: obj.forward(x_0, x_1) and returns: h