class_docstr: Base ``History`` class.
  
  This also includes abstract methods for loading/storing history.
class_docstr_tok: ["Base","``","History","``","class",".","This","also","includes","abstract","methods","for","loading\/storing","history","."]
docstr: Store the string in persistent storage.
docstr_tok: ["Store","the","string","in","persistent","storage","."]
code: def store_string(self, string: str) -> None:
      """
      Store the string in persistent storage.
      """
  
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 5 for calling the History obj's underlying member method code with example usage: obj.store_string(string) without return types