code: def __call__(
      self,
      app: Application,
      state: State,
      notebook_url: str | ProxyUrlFunc,
      **kw: Any,
  ) -> None:
      ...
  
imports: from __future__ import annotations
  import logging
  import json
  import os
  import urllib
  from typing import TYPE_CHECKING, Any, Callable, Literal, Protocol, TypedDict, Union, cast, overload
  from uuid import uuid4
  from ..core.types import ID
  from ..util.serialization import make_id
  from ..util.warnings import warn
  from .state import curstate
label_desc: Use image node_id 1 for calling the ShowApp obj's underlying member method code with example usage: obj.__call__(app, state, notebook_url) without return types