return {"message": "Hello World"}

    def router_startup() -> None:
        state.router_startup = True

    def router_shutdown() -> None:
        state.router_shutdown = True

    router = APIRouter(on_startup=[router_startup], on_shutdown=[router_shutdown])

    def sub_router_startup() -> None:
        state.sub_router_startup = True

    def sub_router_shutdown() -> None: