private static void verifyAddingDispatchMesgs() {
    assertTrue(HARegionQueue.getDispatchedMessagesMapForTesting().isEmpty());
    hrq.addDispatchedMessage(new ThreadIdentifier(new byte[1], 1), 1);
    assertTrue(!HARegionQueue.getDispatchedMessagesMapForTesting().isEmpty());
  }
create a client with 2 regions sharing a common writer
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/ha/HARegionQueueDUnitTest.java