code: def seal(mock):
      
      _frankeinstainize(mock)
      for attr in dir(mock):
          try:
              m = getattr(mock, attr)
          except AttributeError:
              continue
          if not isinstance(m, NonCallableMock):
              continue
          if m._mock_new_parent is mock:
              seal(m)
docs: Disable the automatic generation of "submocks"
  
      Given an input Mock, seals it to ensure no further mocks will be generated
      when accessing an attribute that was not already defined.
  
      Submocks are defined as all mocks which were created DIRECTLY from the
      parent. If a mock is assigned to an attribute of an existing mock,
      it is not considered a submock.