500: {"description": "Server error level 0"},
    },
    default_response_class=ResponseLevel0,
    callbacks=callback_router0.routes,
)

router2_override = APIRouter(
    prefix="/level2",
    tags=["level2a", "level2b"],
    dependencies=[Depends(dep2)],
    responses={
        402: {"description": "Client error level 2"},
        502: {"description": "Server error level 2"},
    },

* `prefix`: to set the path prefix for a router. Up to now, this was only possible when calling `include_router`.
* `tags`: OpenAPI tags to apply to all the *path operations* in this router.

For example:

```Python
from fastapi import APIRouter, Depends


async def some_dependency():
    return