public boolean verifyIfDuplicate(EventID eventId) {
    return queueManager.getState().verifyIfDuplicate(eventId);
  }
Test hook. Verify if this EventId is already present in the map or not. If it is already
present then return true.

@param eventId the EventId of the incoming event
@return true if it is already present
@since GemFire 5.1
geode-core/src/main/java/org/apache/geode/cache/client/internal/PoolImpl.java