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: mod.rs
    path of file: ./repos/icu4x/components/locid/tests/fixtures
    
    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: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).

use std::collections::HashMap;
use std::convert::{TryFrom, TryInto};

use icu_locid::extensions::private;
use icu_locid::extensions::transform;
use icu_locid::extensions::unicode;
use icu_locid::extensions::Extensions;
use icu_locid::{subtags, LanguageIdentifier, Locale, ParserError};
use serde::Deserialize;

#[derive(Debug, Deserialize, Clone)]
pub struct Locale
    
    fn try_from(subtags: LocaleSubtags) -> Result<Self, Self::Error> {
        let language = if let Some(lang) = subtags.language {
            lang.parse().expect("Failed to parse language subtag")
        } else {
            subtags::Language::default()
        };
        let script = subtags
            .script
            .map(|s| s.parse().expect("Failed to parse script subtag."));
        let region = subtags
            .region
            .map(|s| s.parse().expect("Failed to parse region subtag."));
        let variants = subtags
            .variants
            .iter()
            .map(|v| v.parse().expect("Failed to parse variant subtag."))
            .collect::<Vec<_>>();
        let extensions = if let Some(e) = subtags.extensions {
            e.try_into().expect("Failed to parse extensions.")
        } else {
            Extensions::default()
        };
        Ok(Locale {
            id: LanguageIdentifier {
                language,
                script,
                region,
                variants: subtags::Variants::from_vec_unchecked(variants),
            },
            extensions,
        })
    }