#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::net::{SocketAddrV4, Ipv4Addr};
fn main() {
    let mut socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
    socket.set_port(4242);
    assert_eq!(socket.port(), 4242);
}