final Map<IncomingEventInstance, Set<Long>> incompatibleEvents = new HashMap<IncomingEventInstance, Set<Long>>(); final EventService eventService = EnvTool.getEventService(); final List<EventCouple> potentialCouples = eventService.getMessageEventCouples(); for (final EventCouple eventCouple : potentialCouples) { if (!usedIncomings.contains(eventCouple.getIncoming().getId())