code: def test_isdisjoint(self):
      self.assertTrue(self.s.isdisjoint(WeakSet(self.items2)))
      self.assertTrue(not self.s.isdisjoint(WeakSet(self.letters)))
  
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 9 for calling the TestWeakSet obj's underlying member method code with example usage: obj.test_isdisjoint() without return types