You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: matched_path.rs
    path of file: ./repos/axum/axum/src/extract
    
    the code of the file until where you have to start completion: use super::{rejection::*, FromRequestParts};
use crate::routing::{RouteId, NEST_TAIL_PARAM_CAPTURE};
use async_trait::async_trait;
use http::request::Parts;
use std::{collections::HashMap, sync::Arc};

/// Access the path in the router that m
    
    async fn cannot_extract_nested_matched_path_in_middleware_via_extension() {
        async fn assert_no_matched_path<B>(req: Request<B>) -> Request<B> {
            assert!(req.extensions().get::<MatchedPath>().is_none());
            req
        }

        let app = Router::new()
            .nest_service("/:a", Router::new().route("/:b", get(|| async move {})))
            .layer(map_request(assert_no_matched_path));

        let client = TestClient::new(app);

        let res = client.get("/foo/bar").await;
        assert_eq!(res.status(), StatusCode::OK);
    }