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: resolve.rs
    path of file: ./repos/ntex/ntex-connect/src
    
    the code of the file until where you have to start completion: use std::{fmt, io, marker, net};

use ntex_rt::spawn_blocking;
use ntex_service::{Service, ServiceCtx, ServiceFactory};
use ntex_util::future::Either;

use crate::{Address, Connect, ConnectError};

#[derive(Copy)]
/// DNS Resolver Service
pub struct Resolver<T>(mar
    
    async fn resolver() {
        let resolver = Resolver::default().clone();
        assert!(format!("{:?}", resolver).contains("Resolver"));
        let srv = resolver.pipeline(()).await.unwrap();
        assert!(lazy(|cx| srv.poll_ready(cx)).await.is_ready());

        let res = srv.call(Connect::new("www.rust-lang.org")).await;
        assert!(res.is_ok());

        let res = srv.call(Connect::new("---11213")).await;
        assert!(res.is_err());

        let addr: net::SocketAddr = "127.0.0.1:8080".parse().unwrap();
        let res = srv
            .call(Connect::new("www.rust-lang.org").set_addrs(vec![addr]))
            .await
            .unwrap();
        let addrs: Vec<_> = res.addrs().collect();
        assert_eq!(addrs.len(), 1);
        assert!(addrs.contains(&addr));
    }