void expireTheEventOrThreadIdentifier(EntryEvent event) throws CacheException {
    final boolean isDebugEnabled = logger.isDebugEnabled();
    if (isDebugEnabled) {
      logger.debug(
          "HARegionQueue::afterInvalidate. Entry Event being invalidated:{}, isPrimaryQueue:{}",
          event, isPrimary());
    }
    Object key = event.getKey();
    if (key instanceof ThreadIdentifier) {
      // Check if the sequenceID present as value against this key is same
      // as the last dispatched sequence & the size of set containing the
      // counters is 0. If yes the Dace should be removed Get DACE

      DispatchedAndCurrentEvents dace =
          (DispatchedAndCurrentEvents) eventsMap.get(key);
      Assert.assertTrue(dace != null);
      Long expirySequenceID = (Long) event.getOldValue();
      boolean expired = dace.expireOrUpdate(expirySequenceID, (ThreadIdentifier) key);
      if (isDebugEnabled) {
        logger.debug(
            "HARegionQueue::afterInvalidate:Size of the region after expiring or updating the ThreadIdentifier={}",
            region.keys().size());
        logger.debug("HARegionQueue::afterInvalidate:ThreadIdentifier expired={}", expired);
      }
    } else if (key instanceof Long) {
      destroyFromQueue(key);
      Conflatable cf = (Conflatable) event.getOldValue();
      EventID id = cf.getEventId();
      byte[] memID = id.getMembershipID();
      long threadId = id.getThreadID();
      DispatchedAndCurrentEvents dace =
          (DispatchedAndCurrentEvents) eventsMap.get(new ThreadIdentifier(memID, threadId));
      if (shouldBeConflated(cf)) {
        dace.destroy((Long) key, cf.getKeyToConflate(), cf.getRegionToConflate());
      } else {
        dace.destroy((Long) key);
      }
    } // unexpected condition, throw exception?


  }
This function is invoked by the createCacheListenerForHARegion for theHARegionQueue & also by
overridden function createCacheListenerForHARegion of the HARegionQueueJUnitTest class for the
test testConcurrentEventExpiryAndTake. This function provides the meaningful functionality for
expiry of the Event object as well as ThreadIdentifier

@param event event object representing the data being expired
geode-core/src/main/java/org/apache/geode/internal/cache/ha/HARegionQueue.java