private static void validate_ALL_KEYS() {
    try {
      Region r = cache.getRegion(SEPARATOR + REGION_NAME);
      assertNotNull(r);
      assertEquals(r.getEntry(key1).getValue(), "vm1-key-1");
      assertEquals(r.getEntry(key2).getValue(), "vm1-key-2");
    } catch (Exception ex) {
      Assert.fail("failed while validate_ALL_KEY", ex);
    }
  }
exercises the ClientSession interface to register interest in a server on behalf of a client

@param clientId the DM of the client
@param key the key that the client is interested in
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/tier/sockets/InterestListDUnitTest.java