code: def test_and(self):
      i = self.s.intersection(self.items2)
      self.assertEqual(self.s & set(self.items2), i)
      self.assertEqual(self.s & frozenset(self.items2), i)
  
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 10 for calling the TestWeakSet obj's underlying member method code with example usage: obj.test_and() without return types