Function download_file

pub fn download_file<'a, 'b: 'a, F>(
    file_uri: &'b str,
    download_path: &'b str,
    start: usize,
    total: Option<usize>,
    msisdn: Option<&'b str>,
    http_client: &'b Arc<HttpClient>,
    gba_context: &'b Arc<GbaContext>,
    security_context: &'b Arc<SecurityContext>,
    digest_answer: Option<&'a DigestAnswerParams>,
    progress_callback: F,
) -> BoxFuture<'a, Result<(), FileDownloadError>>
where
    F: Fn(u32, i32) + Send + Sync + 'static,