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use gix_trace::{coarse, debug, detail, error, event, info, span, trace, warn};#[test]fn span() {    let _x = span!(gix_trace::Level::Coarse, "hello");    let forty_two = span!(gix_trace::Level::Coarse, "hello", x = "value", y = 42).into_scope(|| 42);    assert_eq!(forty_two, 42);    let span = span!(target: "other", gix_trace::Level::Coarse, "hello", x = "value", y = 42);    span.record("y", "hello").record("x", 36);} #[test]fn coarse() {    let _x = coarse!("hello");    coarse!("hello", x = "value", y = 42);    coarse!(target: "other", "hello", x = "value", y = 42).into_scope(|| {        event!(gix_trace::event::Level::ERROR, "an error");        event!(gix_trace::event::Level::WARN, "an info: {}", 42);        event!(gix_trace::event::Level::INFO, answer = 42, field = "some");        #[derive(Debug)]        struct User {            name: &'static str,            email: &'static str,        }        let user = User {            name: "ferris",            email: "ferris@example.com",        };        event!(gix_trace::event::Level::DEBUG, user.name, user.email);        event!(gix_trace::event::Level::TRACE, greeting = ?user, display = %user.name);         error!("hello {}", 42);        warn!("hello {}", 42);        info!("hello {}", 42);        debug!("hello {}", 42);        trace!("hello {}", 42);    });} #[test]fn detail() {    let _y = detail!("hello");    detail!("hello", x = "value", y = 42);    detail!(target: "other", "hello", x = "value", y = 42);}