code: def tearDownClass(cls):
      super(TFClusterTest, cls).tearDownClass()
  
file_path: TensorFlowOnSpark/tests/test_TFCluster.py
imports: import unittest
  import test
  import time
  from tensorflowonspark import TFCluster, TFNode
label_desc: Use image node_id 2 for calling the TFClusterTest obj's underlying member method code with example usage: obj.tearDownClass(cls) without return types