router_b = APIRouter(route_class=APIRouteB)
router_c = APIRouter(route_class=APIRouteC)


@router_a.get("/")
def get_a():
    return {"msg": "A"}


@router_b.get("/")
def get_b():
    return {"msg": "B"}


@router_c.get("/")
def get_c():
    return {"msg": "C"}


router_b.include_router(router=router_c, prefix="/c")
router_a.include_router(router=router_b, prefix="/b")

Some requests will have a cached response. When this cached response isn’t fresh, OkHttp can do a _conditional GET_ to download an updated response if it’s newer than what’s cached. This requires headers like `If-Modified-Since` and `If-None-Match` to be added.

## Rewriting Responses

        map.put("a", "A");
        map.put("b", true);
        map.put("c", 3);
        map.put("d", 1.4);
        final HogeDto hoge = new HogeDto();
        BeanUtil.copyMapToBean(map, hoge);
        assertThat(hoge.getA(), is("A"));
        assertThat(hoge.isB(), is(true));
        assertThat(hoge.getC(), is(3));
    }

    /**
     * @throws Exception
     */
    @Test