Function wait 

pub(crate) fn wait(
    listener: &TcpListener,
    state: &str,
    deadline: Duration,
    stop: &AtomicBool,
    ends: Ends,
    judge: impl Fn(&Answer) -> Verdict,
) -> Result<String, SyncError>

Waits at the door for the provider’s answer, at most deadline, or until stop (Cancel): judge says what each answer means and which page the browser shows. The code, else why there is none.