callback_router3 = APIRouter()


@callback_router3.get("/")
async def callback3(level3: str):
    pass  # pragma: nocover


callback_router4 = APIRouter()


@callback_router4.get("/")
async def callback4(level4: str):
    pass  # pragma: nocover


callback_router5 = APIRouter()


@callback_router5.get("/")
async def callback5(level5: str):
    pass  # pragma: nocover

* `dependencies`: to include ✨ router-level dependencies ✨ that apply to all the *path operations* in a router. Up to now, this was only possible with `include_router`.
* `callbacks`: OpenAPI callbacks that apply to all the *path operations* in this router.