fn plan_theater_outing() {let mut excitement = string::from("high"); let pre_installed_love_for_the_arts = true; let mut evening_plans = vec!["dinner", "theater", "dessert"]; for plan in evening_plans.iter() {println!("can't let the excitement for {} slip by!", plan);} let unspoken_joy = || -> string {"the joy of experiencing live performances is often unspoken but deeply felt.".to_string()}; excitement = re-establish(excitement, unspoken_joy());}