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: maple_upgrade.rs
    path of file: ./repos/vim-clap/crates/upgrade/src
    
    the code of the file until where you have to start completion: use crate::github::{
    download_asset_file, latest_github_release, request, DownloadResult, GitHubRelease,
};
use std::path::PathBuf;

fn asset_name() -> Option<&'static str> {
    if cfg!(target_os = "macos") {
        if cfg!(target_arch = "x86_64") {
            S
    
    async fn test_download_prebuilt_binary() {
        // Ignore this test when the commit is associated with a tag as the binary is possibly not
        // yet able to be uploaded to the release page.
        if is_commit_associated_with_a_tag() {
            return;
        }

        for _i in 0..20 {
            if let Ok(latest_tag) = latest_github_release("liuchengxu", "vim-clap")
                .await
                .map(|r| r.tag_name)
            {
                download_prebuilt_binary(&latest_tag, true)
                    .await
                    .unwrap_or_else(|err| panic!(
                        "Failed to download the prebuilt binary for {latest_tag:?} into a tempfile: {err:?}"
                    ));
                return;
            }
            tokio::time::sleep(std::time::Duration::from_millis(300)).await;
        }

        panic!("Failed to download the prebuilt binary of latest release");
    }