code: def tearDown(self):
      # Note: don't clean up artifacts after test (in case we need to view/debug)
      pass
  
file_path: TensorFlowOnSpark/tests/test_dfutil.py
imports: import os
  import shutil
  import test
  import unittest
  from tensorflowonspark import dfutil
label_desc: Use image node_id 4 for calling the DFUtilTest obj's underlying member method code with example usage: obj.tearDown() without return types