If I can guarantee that a value will exist in a HashMap for a specific key, such that either of the three options below will not panic, what would be the most idiomatic way of doing so?

    let mut example_map: HashMap<String, String> = HashMap::new();
    
    let key = String::from("Test_Key");
    let value = String::from("Test Value");

    example_map.insert(key.clone(), value);

    let foo = example_map[&key].clone();
    let bar = example_map.get(&key).unwrap().clone();
    let baz = example_map.get(&key).expect("failure message").clone();

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