You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: locale_canonicalizer.rs
    path of file: ./repos/icu4x/components/locid_transform/benches
    
    the code of the file until where you have to start completion: // This file is part of ICU4X. For terms of use, please see the file
// called LICENSE at the top level of the ICU4X source tree
// (online at: htt
    
fn canonicalize_noop_bench(c: &mut Criterion) {
    let lc = LocaleCanonicalizer::new();

    let mut group = c.benchmark_group("canonicalized");

    // None of these locales require canonicalization, so this measures the cost of calling
    // the canonicalizer on locales that will not be modified.
    let data: Vec<String> = serde_json::from_str(include_str!("fixtures/locales.json"))
        .expect("Failed to read a fixture");
    let locales: Vec<Locale> = data.iter().map(|s| s.parse().unwrap()).collect();

    group.bench_function("clone", |b| {
        b.iter(|| {
            for locale in &locales {
                let _ = black_box(locale).clone();
            }
        })
    });

    group.bench_function("canonicalize", |b| {
        b.iter(|| {
            for locale in &locales {
                let mut locale = black_box(locale).clone();
                lc.canonicalize(&mut locale);
            }
        })
    });

    group.finish();
}