response.headers["x-level5"] = "True"


callback_router0 = APIRouter()


@callback_router0.get("/")
async def callback0(level0: str):
    pass  # pragma: nocover


callback_router1 = APIRouter()


@callback_router1.get("/")
async def callback1(level1: str):
    pass  # pragma: nocover


callback_router2 = APIRouter()


@callback_router2.get("/")
async def callback2(level2: str):

```Python
from fastapi import APIRouter, Depends


async def some_dependency():
    return


router = APIRouter(prefix="/users", dependencies=[Depends(some_dependency)])
```

**In `include_router`**

Most of these settings are now supported in `APIRouter`, which normally lives closer to the related code, so it is recommended to use `APIRouter` when possible.