code: def pre(self) -> None:
      return None
  
imports: import collections
  import itertools
  import re
  import warnings
  from typing import Callable, Iterator, List, Optional, SupportsInt, Tuple, Union
  from ._structures import Infinity, InfinityType, NegativeInfinity, NegativeInfinityType
label_desc: Use image node_id 8 for calling the LegacyVersion obj's underlying member method code with example usage: obj.pre() and returns: None