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: numberformat.rs
    path of file: ./repos/fluent-rs/intl-memoizer/examples
    
    the code of the file until where you have to start completion: use intl_memoizer::{IntlMemoizer, Memoizable};
use unic_langid::LanguageIdentifier;

#[derive(Clone, Hash, PartialEq, Eq)]
struct NumberFormatOptions {
    minimum_fraction_digits: usize,
    maximum_fraction_digits: usize,
}

struct NumberFormat {
    lang: LanguageIdenti
    
fn main() {
    let mut memoizer = IntlMemoizer::default();

    let lang: LanguageIdentifier = "en-US".parse().unwrap();
    {
        // Create an en-US memoizer
        let lang_memoizer = memoizer.get_for_lang(lang.clone());
        let options = NumberFormatOptions {
            minimum_fraction_digits: 3,
            maximum_fraction_digits: 5,
        };
        let result = lang_memoizer
            .with_try_get::<NumberFormat, _, _>((options,), |nf| nf.format(2))
            .unwrap();

        assert_eq!(&result, "en-US: 2, MFD: 3");

        // Reuse the same en-US memoizer
        let lang_memoizer = memoizer.get_for_lang(lang.clone());
        let options = NumberFormatOptions {
            minimum_fraction_digits: 3,
            maximum_fraction_digits: 5,
        };
        let result = lang_memoizer
            .with_try_get::<NumberFormat, _, _>((options,), |nf| nf.format(1))
            .unwrap();
        assert_eq!(&result, "en-US: 1, MFD: 3");
    }

    {
        // Here, we will construct a new lang memoizer
        let lang_memoizer = memoizer.get_for_lang(lang);
        let options = NumberFormatOptions {
            minimum_fraction_digits: 3,
            maximum_fraction_digits: 5,
        };
        let result = lang_memoizer
            .with_try_get::<NumberFormat, _, _>((options,), |nf| nf.format(7))
            .unwrap();

        assert_eq!(&result, "en-US: 7, MFD: 3");
    }
}