private static void validateRegionEntriesFromInterestListInVm2() {
    Region r = cache.getRegion(SEPARATOR + REGION_NAME);
    assertNotNull(r);
    assertEquals(r.getEntry("k3").getValue(), "server3");
    assertEquals(r.getEntry("k4").getValue(), "server4");
    assertEquals(r.getEntry("k5").getValue(), "server5");
  }
unregister a key for a particular client in the server

@param clientId the client's ID
@param key the key it's no longer interest in
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/tier/sockets/InterestListDUnitTest.java