code: def shutdown() -> None:
      worker.stop()
      print("Worker Stop !!!")
  
file_path: PySyft/packages/grid/backend/grid/main.py
imports: from typing import Dict
  from fastapi import FastAPI
  from fastapi.responses import JSONResponse
  from starlette.middleware.cors import CORSMiddleware
  from syft.protocol.data_protocol import stage_protocol_changes
  from grid.api.router import api_router
  from grid.core.config import settings
  from grid.core.node import worker
  from grid.logger.handler import get_log_handler
label_desc: Use image node_id 1 for calling a global function with example usage: shutdown() without return types