code: private void fireTangoArchiveEvent(TangoArchive tangoArchive, EventData eventData) {
          TangoArchiveEvent archiveEvent = new TangoArchiveEvent(tangoArchive, eventData);
          // Notifying those that are interested in this event
          ArrayList<EventListener> listeners = event_listeners.getListeners(ITangoArchiveListener.class);
          for (EventListener eventListener : listeners) {
              ((ITangoArchiveListener) eventListener).archive(archiveEvent);
          }
      }
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