@Override
        public String remove(@NonNull Object k) {
            UUID key = (UUID) k;
            String username = super.remove(key);
            if (username != null) {
                this.reverse.remove(username.toLowerCase(Locale.ROOT), key);
            }
            return username;
        }
Gets the most recent username used by a given uuid

@param uuid the uuid to lookup with
@return a username, or null
common/src/main/java/me/lucko/luckperms/common/storage/implementation/file/FileUuidCache.java