class_docstr: Contains session data for a single "user" of an active app
  (that is, a connected browser tab).
  
  Each AppSession has its own ScriptData, root DeltaGenerator, ScriptRunner,
  and widget state.
  
  An AppSession is attached to each thread involved in running its script.
class_docstr_tok: ["Contains","session","data","for","a","single","``","user","''","of","an","active","app","(","that","is",",","a","connected","browser","tab",")",".","Each","AppSession","has","its","own","ScriptData",",","root","DeltaGenerator",",","ScriptRunner",",","and","widget","state",".","An","AppSession","is","attached","to","each","thread","involved","in","running","its","script","."]
docstr: Create and return a session_status_changed ForwardMsg.
docstr_tok: ["Create","and","return","a","session_status_changed","ForwardMsg","."]
code: def _create_session_status_changed_message(self) -> ForwardMsg:
      """Create and return a session_status_changed ForwardMsg."""
      msg = ForwardMsg()
      msg.session_status_changed.run_on_save = self._run_on_save
      msg.session_status_changed.script_is_running = (
          self._state == AppSessionState.APP_IS_RUNNING
      )
      return msg
  
imports: import asyncio
  import sys
  import uuid
  from enum import Enum
  from typing import TYPE_CHECKING, Callable, Dict, List, Optional, Union
  import streamlit.elements.exception
  from streamlit import config, runtime, source_util
  from streamlit.case_converters import to_snake_case
  from streamlit.logger import get_logger
  from streamlit.proto.BackMsg_pb2 import BackMsg
  from streamlit.proto.ClientState_pb2 import ClientState
  from streamlit.proto.Common_pb2 import FileURLs, FileURLsRequest
  from streamlit.proto.ForwardMsg_pb2 import ForwardMsg
  from streamlit.proto.GitInfo_pb2 import GitInfo
  from streamlit.proto.NewSession_pb2 import Config, CustomThemeConfig, NewSession, UserInfo
  from streamlit.proto.PagesChanged_pb2 import PagesChanged
  from streamlit.runtime import caching, legacy_caching
  from streamlit.runtime.forward_msg_queue import ForwardMsgQueue
  from streamlit.runtime.metrics_util import Installation
  from streamlit.runtime.script_data import ScriptData
  from streamlit.runtime.scriptrunner import RerunData, ScriptRunner, ScriptRunnerEvent
  from streamlit.runtime.scriptrunner.script_cache import ScriptCache
  from streamlit.runtime.secrets import secrets_singleton
  from streamlit.runtime.uploaded_file_manager import UploadedFileManager
  from streamlit.version import STREAMLIT_VERSION_STRING
  from streamlit.watcher import LocalSourcesWatcher
label_desc: Use image node_id 21 for calling the AppSession obj's underlying member method code with example usage: obj._create_session_status_changed_message() and returns: msg