long getLastDispatchedSequenceId(EventID id) {
    ThreadIdentifier tid = getThreadIdentifier(id);
    DispatchedAndCurrentEvents wrapper = (DispatchedAndCurrentEvents) eventsMap.get(tid);
    return wrapper.lastDispatchedSequenceId;
  }
Used for testing purposes only. Returns the last dispatched sequenceId for the given
ThreadIdentifier

@param id - the EventID object
@return - the current counters set
geode-core/src/main/java/org/apache/geode/internal/cache/ha/HARegionQueue.java