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: client.rs
    path of file: ./repos/pingora/pingora/examples
    
    the code of the file until where you have to start completion: // Copyright 2024 
    
async fn main() {
    let connector = Connector::new(None);

    let mut peer = HttpPeer::new("1.1.1.1:443", true, "one.one.one.one".into());
    peer.options.set_http_version(2, 1);
    let (mut http, _reused) = connector.get_http_session(&peer).await.unwrap();

    let mut new_request = RequestHeader::build("GET", b"/", None).unwrap();
    new_request
        .insert_header("Host", "one.one.one.one")
        .unwrap();
    http.write_request_header(Box::new(new_request))
        .await
        .unwrap();
    // Servers usually don't respond until the full request body is read.
    http.finish_request_body().await.unwrap();
    http.read_response_header().await.unwrap();
    println!("{:#?}", http.response_header().unwrap());
    // TODO: continue reading the body
    // TODO: return the connection back to the `connector` (or discard it)
}