public static void tombstonegc() throws Exception {
    LocalRegion r = (LocalRegion) cache.getRegion(SEPARATOR + REGION_NAME);
    assertNotNull(r);

    DistributedMember id = r.getCache().getDistributedSystem().getDistributedMember();
    RegionEventImpl regionEvent = new RegionEventImpl(r, Operation.REGION_DESTROY, null, true, id);

    FilterInfo clientRouting = r.getFilterProfile().getLocalFilterRouting(regionEvent);
    assertTrue(clientRouting.getInterestedClients().size() > 0);

    regionEvent.setLocalFilterInfo(clientRouting);

    Map<VersionSource<?>, Long> map = Collections.emptyMap();
    ClientTombstoneMessage message =
        ClientTombstoneMessage.gc(r, map, new EventID(r.getCache().getDistributedSystem()));
    CacheClientNotifier.notifyClients(regionEvent, message);
  }
queue a tombstone GC message for the client. See bug #46832
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/ha/HAGIIDistributedTest.java