code: def vi_digraph_mode() -> bool:
      app = get_app()
      if app.editing_mode != EditingMode.VI:
          return False
  
      return app.vi_state.waiting_for_digraph
  
imports: from __future__ import annotations
  from typing import TYPE_CHECKING, cast
  from prompt_toolkit.application.current import get_app
  from prompt_toolkit.cache import memoized
  from prompt_toolkit.enums import EditingMode
  from .base import Condition
label_desc: Use image node_id 23 for calling a global function with example usage: vi_digraph_mode() and returns: app, False