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: custom-tls.rs
    path of file: ./repos/ureq/examples
    
    the code of the file until where you have to start completion: use std::fmt;
use std::io;
use std::net::TcpStream;
use std::sync::Arc;

use ureq::{Error, ReadWrite, TlsConnector};

pub fn main() -> Result<(), Error> {
    let pass = PassThrough {
        handshake_fail: false,
    };

    let agent = u
    
pub fn main() -> Result<(), Error> {
    let pass = PassThrough {
        handshake_fail: false,
    };

    let agent = ureq::builder().tls_connector(Arc::new(pass)).build();

    let _response = agent.get("https://httpbin.org/").call();

    // Uncomment this if handshake_fail is set to true above.
    // assert_eq!(
    //     _response.unwrap_err().to_string(),
    //     "https://httpbin.org/: Network Error: Tls handshake failed"
    // );

    Ok(())
}