code: def tearDownClass(cls):
      try:
          # Stopping Spark Connect closes the session in JVM at the server.
          cls.spark = cls.connect
          del os.environ["PYSPARK_NO_NAMESPACE_SHARE"]
      finally:
          super(SparkConnectReattachTestCase, cls).tearDownClass()
  
file_path: spark/python/pyspark/sql/tests/connect/client/test_reattach.py
imports: import os
  import unittest
  from pyspark.sql import SparkSession
  from pyspark.testing.connectutils import ReusedConnectTestCase
  from pyspark.testing.pandasutils import PandasOnSparkTestUtils
  from pyspark.testing.sqlutils import SQLTestUtils
  from pyspark.testing.utils import eventually
label_desc: Use image node_id 2 for calling the SparkConnectReattachTestCase obj's underlying member method code with example usage: obj.tearDownClass(cls) without return types