code: def tearDown(self):
      pass
  
file_path: apex/tests/L0/run_amp/test_multi_tensor_l2norm.py
imports: import unittest
  import functools
  import itertools
  from apex import amp
  import torch
  from torch import nn
  import torch.nn.functional
  from utils import common_init, HALF, FLOAT, ALWAYS_HALF, ALWAYS_FLOAT, MATCH_INPUT
label_desc: Use image node_id 2 for calling the TestMultiTensorL2Norm obj's underlying member method code with example usage: obj.tearDown() without return types