if (uidService != null) { serviceBroker.releaseService( this, UIDService.class, uidService); uidService = null; }
    public void unload() {        super.unload();        if (blackboard != null) {            serviceBroker.releaseService(            this, BlackboardService.class, blackboard);            blackboard = null;        }        if (eventService != null) {            serviceBroker.releaseService(            this, EventService.class, eventService);            eventService = null;        }        if ((logger != null) && (logger != LoggingService.NULL)) {            serviceBroker.releaseService(            this, LoggingService.class, logger);            logger = LoggingService.NULL;        }        if (uidService != null) {            serviceBroker.releaseService(            this, UIDService.class, uidService);            uidService = null;        }            }