class_docstr: Interface for a KeyBindings.
docstr: For cache invalidation. - This should increase every time that
  something changes.
docstr_tok: ["For","cache","invalidation",".","-","This","should","increase","every","time","that","something","changes","."]
code: def _version(self) -> Hashable:
      """
      For cache invalidation. - This should increase every time that
      something changes.
      """
      return 0
  
imports: from __future__ import annotations
  from abc import ABCMeta, abstractmethod, abstractproperty
  from inspect import isawaitable
  from typing import TYPE_CHECKING, Any, Callable, Coroutine, Hashable, Sequence, Tuple, TypeVar, Union, cast
  from prompt_toolkit.cache import SimpleCache
  from prompt_toolkit.filters import FilterOrBool, Never, to_filter
  from prompt_toolkit.keys import KEY_ALIASES, Keys
label_desc: Use image node_id 1 for calling the KeyBindingsBase obj's underlying member method code with example usage: obj._version() and returns: int