fn main() {
use traceon::{info, info_span};
let _guard = traceon::on_thread();
let _span = info_span!("span_with_field", field = "temp", "cool").entered();
info!("first subscriber");
let _guard = traceon::json_thread();
let _span = info_span!("span_with_no_field").entered();
info!("second subscriber")
}