code: def tearDown(self):
      disconnect()
  
file_path: PARL/parl/remote/tests/remote_class_test.py
imports: import unittest
  import parl
  import time
  import threading
  from parl.remote.master import Master
  from parl.remote.worker import Worker
  from parl.remote.client import disconnect
  from parl.utils import get_free_tcp_port
label_desc: Use image node_id 1 for calling the TestCluster obj's underlying member method code with example usage: obj.tearDown() without return types