@Override
      public Object call() {
        for (int i = 0; i < 10; i++) {
          assertTrue("expected a tombstone for Object" + i,
              TestRegion.containsTombstone("Object" + i));
        }
        return null;
      }
test that clients receive tombstones in register-interest results
geode-core/src/distributedTest/java/org/apache/geode/cache30/ClientServerCCEDUnitTest.java