public int compare(Entry entry, Entry otherEntry) { return -(entry.getWhenBooked().compareTo(otherEntry.getWhenBooked()));
public int compare(Entry leftEntry, Entry rightEntry) { int comparationResult = leftEntry.getWhenBooked().compareTo(rightEntry.getWhenBooked()); return (comparationResult == 0) ? leftEntry.getIdInternal().compareTo( rightEntry.getIdInternal()) : comparationResult;
        public int compare(Entry entry, Entry otherEntry) {            return -(entry.getWhenBooked().compareTo(otherEntry.getWhenBooked()));        }