code: def tearDownClass(cls):
      super(DFUtilTest, cls).tearDownClass()
  
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 2 for calling the DFUtilTest obj's underlying member method code with example usage: obj.tearDownClass(cls) without return types