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: git.rs
    path of file: ./repos/ajour/crates/core/src/repository/backend
    
    the code of the file until where you have to start completion: use crate::config::Flavor;
use crate::error::{DownloadError, RepositoryError};
use crate::repository::RepositoryPackage;

use futures::future::join_all;
use isahc::http::Uri;
use serde::Deserialize;

pub use github::Github;
pub use gitlab::Gitlab;

#[derive(Debug, Clone, Deserialize)]
pub struct ReleaseFileMetadata {
    flavor: Flavor,
    interface: i32,
}

#[derive(Debug, Clone, Deserialize)]
pub struct ReleaseFilePackage {
    filename: String,
    nolib: bool,
    metadata: Ve
    
        async fn get_metadata(&self) -> Result<RepositoryMetadata, RepositoryError> {
            let mut path = self.url.path();
            // Remove leading slash
            path = path.trim_start_matches('/');

            // Encode entire path for API
            let encoded = urlencoding::encode(path);

            // Get last path part as repo name
            let path_parts = path.split('/');
            let repo = path_parts.last().ok_or(RepositoryError::GitMissingRepo {
                url: self.url.to_string(),
            })?;

            let url = format!("https://gitlab.com/api/v4/projects/{}/releases", &encoded);

            let mut resp = request_async(&url, vec![], None).await?;

            let releases: Vec<Release> = resp
                .json()
                .await
                .map_err(|_| RepositoryError::GitMissingRelease { url: url.clone() })?;
            let release = releases
                .get(0)
                .ok_or(RepositoryError::GitMissingRelease { url: url.clone() })?;

            let version = release.tag_name.clone();

            let asset = match find_asset(release, self.flavor).await.ok().flatten() {
                Some(asset) => Some(asset),
                None => find_asset_fallback(release, self.flavor),
            };

            if let Some(asset) = asset {
                let download_url = asset.url.clone();
                let date_time = Some(release.released_at);

                let mut remote_packages = HashMap::new();
                let remote_package = RemotePackage {
                    version: version.clone(),
                    download_url,
                    date_time,
                    file_id: None,
                    modules: vec![],
                };

                remote_packages.insert(ReleaseChannel::Stable, remote_package);

                let metadata = RepositoryMetadata {
                    website_url: Some(self.url.to_string()),
                    changelog_url: Some(format!("{}/-/tags/{}", self.url, version)),
                    remote_packages,
                    title: Some(repo.to_string()),
                    ..Default::default()
                };

                Ok(metadata)
            } else {
                Err(RepositoryError::GitNoZip {
                    flavor: self.flavor,
                    url: self.url.to_string(),
                })
            }
        }