{"ast_node_type":"other","tokens":[{"end":45,"kind":"keyword","start":0,"text":")"}]}
) -> UnordMap<PathBuf, Option<flock::Lock>> {
    deletion_candidates: UnordMap<(SystemTime, PathBuf), Option<flock::Lock>>,
    let most_recent = deletion_candidates.items().map(|(&(timestamp, _), _)| timestamp).max();