code: def tearDown(self):
      pass
  
imports: import unittest
  import os
  import torch
  from torch.optim import Optimizer
  import apex
  from apex.multi_tensor_apply import multi_tensor_applier
  from itertools import product
label_desc: Use image node_id 2 for calling the TestLamb obj's underlying member method code with example usage: obj.tearDown() without return types