@Override
      public void run() {
        Set<String> keys = new HashSet();
        for (int i = 0; i < 10; i++) {
          keys.add("Object" + i);
        }
        Map result = TestRegion.getAll(keys);
        for (int i = 0; i < 10; i++) {
          assertNull("expected no result for Object" + i, result.get("Object" + i));
        }
      }
test that clients receive tombstones in register-interest results
geode-core/src/distributedTest/java/org/apache/geode/cache30/ClientServerCCEDUnitTest.java