class_docstr: :class:`.History` class that keeps a list of all strings in memory.
  
  In order to prepopulate the history, it's possible to call either
  `append_string` for all items or pass a list of strings to `__init__` here.
code: def load_history_strings(self) -> Iterable[str]:
      yield from self._storage[::-1]
  
imports: from __future__ import annotations
  import datetime
  import os
  import threading
  from abc import ABCMeta, abstractmethod
  from asyncio import get_running_loop
  from typing import AsyncGenerator, Iterable, Sequence
label_desc: Use image node_id 2 for calling the InMemoryHistory obj's underlying member method code with example usage: obj.load_history_strings() without return types