code: def forward(self, x):
      return self.layer1(x)
  
imports: from unittest import TestCase
  from mock import patch, Mock
  from torch import nn
  from torchbearer.callbacks.manifold_mixup import ManifoldMixup
  import torchbearer
  import torch
label_desc: Use image node_id 2 for calling the TestModule2 obj's underlying member method code with example usage: obj.forward(x) and returns: self