code: def forward(self, x):
      h1 = F.relu(self.bn1(self.conv1(x)))
      h1 = F.relu(self.bn2(self.conv2(h1)))
      h1 = self.bn3(self.conv3(h1))
      h2 = self.bn4(self.conv4(x))
  
      return F.relu(h1 + h2)
  
imports: import chainer
  import chainer.functions
  from chainer import initializers
  import chainer.links
label_desc: Use image node_id 2 for calling the BottleNeckA obj's underlying member method code with example usage: obj.forward(x) and returns: F