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: build.rs
    path of file: ./repos/icu4x/docs/tutorials/rust/baked
    
    the code of the file until where you have to start completion: // This file is part of ICU4X. For terms of use, please see t
    
fn main() {
    println!("cargo:rerun-if-changed=build.rs");

    let mod_directory = PathBuf::from(std::env::var_os("OUT_DIR").unwrap()).join("baked_data");

    DatagenDriver::new()
        .with_locales([langid!("ru")])
        // These are the keys required by `PluralRules::try_new_cardinal_unstable`. Compilation will
        // discard unused keys and fail if required keys are not generated, but explicitly listing the
        // keys will speed up the datagen.
        .with_keys([icu::plurals::provider::CardinalV1Marker::KEY])
        .with_fallback_mode(FallbackMode::RuntimeManual)
        .export(
            &DatagenProvider::new_latest_tested(),
            BakedExporter::new(mod_directory, {
                let mut options = Options::default();
                options.overwrite = true;
                options
            })
            .unwrap(),
        )
        .expect("Datagen should be successful");
}