#[extension_trait::extension_trait]
impl RouterExt for axum::Router {
    fn register<T: serde::Serialize + serde::de::DeserializeOwned + 'static>(self) -> Self {
        self.route("/test", axum::routing::post(async |_r: axum::Json<T>| { }))
    }
}

#[extension_trait::extension_trait]
impl RouterExt for axum::Router {
    fn register_request<Svr, Req, Fut, Hdlr>(self, server: Arc<Svr>, handler: Hdlr) -> Self
    where
        Req: Request,
        Fut: Future<Output = Response<Req::ResponseData>> + Send,
        Hdlr: Fn(&Svr, Req) -> Fut + Clone + Send + 'static,
    {
        let router = |axum::Json(req): axum::Json<Req>| async {
            let resp = handler(&server, req).await;
            axum::Json(resp)
        };
        self.route(Req::NAME, axum::routing::post(router))
    }
}