code: def test_index(
      self, test_index: _typing.Optional[_typing.Iterable[int]]
  ):
      if not (
          test_index is None or isinstance(test_index, _typing.Iterable)
      ):
          raise TypeError
      elif test_index is None:
          self.__test_index: _typing.Optional[_typing.Set[int]] = None
      elif isinstance(test_index, _typing.Iterable):
          if len(list(test_index)) == 0:
              self.__test_index: _typing.Optional[
                  _typing.Iterable[int]
              ] = None
              return
          if not all([isinstance(i, int) for i in test_index]):
              raise TypeError
          if not (0 <= min(test_index) <= max(test_index) < len(self)):
              raise ValueError
          self.__test_index: _typing.Optional[
              _typing.Iterable[int]
          ] = test_index
  
imports: import typing
label_desc: Use image node_id 17 for calling the InMemoryDataset obj's underlying member method code with example usage: obj.test_index(test_index) without return types