@Override
        public Boolean remove(Object k) {
            Permissible key = (Permissible) k;
            return unsubscribe(key, this.permission) ? true : null;
        }
Value map extension which includes LP objects in Permissible related queries.
bukkit/src/main/java/me/lucko/luckperms/bukkit/inject/server/LuckPermsSubscriptionMap.java