private void addSupersedingTariffs (HashSet<Tariff> newTariffs) { List<TariffSubscription> revokedSubscriptions = getTariffSubscriptionRepo().getRevokedSubscriptionList(customerInfo); for (TariffSubscription sub : revokedSubscriptions) { Tariff supTariff = sub.getTariff().getIsSupersededBy(); if (null != supTariff && supTariff.isSubscribable()) newTariffs.add(supTariff); } }