code: def setUp(self):
      with contextlib.ExitStack() as stack:
          stack.enter_context(
              test_support.set_zoneinfo_module(self.module)
          )
          self.addCleanup(stack.pop_all().close)
  
      super().setUp()
  
imports: import contextlib
  import datetime
  import os
  import pickle
  import unittest
  import zoneinfo
  from test.support.hypothesis_helper import hypothesis
  import test.test_zoneinfo._support
label_desc: Use image node_id 1 for calling the ZoneInfoPickleTest obj's underlying member method code with example usage: obj.setUp() without return types