code: def test_subclasses(self):
      class MockSub(Mock):
          pass
  
      one = MockSub()
      self.assertTrue(issubclass(type(one.one), MockSub))
  
      class MagicSub(MagicMock):
          pass
  
      two = MagicSub()
      self.assertTrue(issubclass(type(two.two), MagicSub))
  
file_path: cpython/Lib/test/test_unittest/testmock/testcallable.py
imports: import unittest
  from test.test_unittest.testmock.support import is_instance, X, SomeClass
  from unittest.mock import Mock, MagicMock, NonCallableMagicMock, NonCallableMock, patch, create_autospec, CallableMixin
label_desc: Use image node_id 5 for calling the TestCallable obj's underlying member method code with example usage: obj.test_subclasses() without return types