code: def test_update_set(self):
      self.s.update(set(self.items2))
      for c in self.items + self.items2:
          self.assertIn(c, self.s)
  
imports: import unittest
  from weakref import WeakSet
  import copy
  import string
  from collections import UserString
  from collections.abc import Set, MutableSet
  import gc
  import contextlib
  from test import support
label_desc: Use image node_id 30 for calling the TestWeakSet obj's underlying member method code with example usage: obj.test_update_set() without return types