class Leaderboard {

    public List<String> driverRankings() {
        Map<String, Integer> results = driverResults();
        List<String> resultsList = new ArrayList<String>(results.keySet());
        Collections.sort(resultsList, new DriverByPointsDescendingComparator(results));
        return resultsList;
    }

    public  Leaderboard(Race... races);

}