callbacks=callback_router1.routes,
    dependencies=[Depends(dep1)],
    response_class=ResponseLevel1,
)
async def path1_override(level1: str):
    return level1


@app.get("/default1")
async def path1_default(level1: str):
    return level1


@router2_override.get(
    "/override3",
    tags=["path3a", "path3b"],
    responses={
        403: {"description": "Client error level 3"},