code: def forward(self, x):
      x = self.fc1(x)
      x = self.conv1(x.view(-1, 1, 1))
      x = self.relu(x)
      x = self.layer1(x)
      x = self.layer2(x)
      return 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 TestModel obj's underlying member method code with example usage: obj.forward(x) and returns: x