code: def tearDown(self):
      # environmental variables do not propagate outside the scope of this test
      # but we'll clean it up anyway
      del os.environ["CLASSY_BLOCK_STATELESS"]
  
file_path: ClassyVision/test/models_classy_block_stateless_test.py
imports: import os
  import unittest
  import torch
  from classy_vision.models import ClassyBlock
label_desc: Use image node_id 2 for calling the TestClassyStatelessBlock obj's underlying member method code with example usage: obj.tearDown() without return types