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: tower_compat.rs
    path of file: ./repos/salvo/crates/core/src
    
    the code of the file until where you have to start completion: //! Tower service compat.
use std::error::Error as StdError;
use std::fmt;
use std::future::Future;
use std::io::{Error as IoError, ErrorKind};
use std::marker::PhantomData;
use std::sync::Arc;
use std::task::{Context, Poll};

use futures_util::future::{BoxFuture, FutureExt};
use http_body_util::BodyExt;
use hyper::body::{Body, Bytes};
use tower::buffer::Buffer;
use tower::{Layer, Service, ServiceExt};

use crate::http::{ReqBody, ResBody, StatusError};
use crate::{async_trait, Depot, FlowCtrl, Handler, Request, Response};

/// Trait for tower service compat.
pub trait TowerServiceCompat<QB, SB, E, Fut> {
    /// Converts a tower service to a salvo handler.
    fn comp
    
    async fn test_tower_layer() {
        struct TestService<S> {
            inner: S,
        }

        impl<S, Req> tower::Service<Req> for TestService<S>
        where
            S: Service<Req>,
        {
            type Response = S::Response;
            type Error = S::Error;
            type Future = S::Future;

            fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
                self.inner.poll_ready(cx)
            }

            fn call(&mut self, req: Req) -> Self::Future {
                self.inner.call(req)
            }
        }

        struct MyServiceLayer;

        impl<S> Layer<S> for MyServiceLayer {
            type Service = TestService<S>;

            fn layer(&self, inner: S) -> Self::Service {
                TestService { inner }
            }
        }

        #[handler]
        async fn hello() -> &'static str {
            "Hello World"
        }
        let router = Router::new().hoop(MyServiceLayer.compat()).get(hello);
        assert_eq!(
            TestClient::get("http://127.0.0.1:5800")
                .send(router)
                .await
                .take_string()
                .await
                .unwrap(),
            "Hello World"
        );
    }