public static void createEntries() throws Exception {
    creationTime = 0;
    Region r1 = cache.getRegion(SEPARATOR + REGION_NAME);
    String keyPrefix = "server-";
    for (int i = 0; i < 5; i++) {
      r1.create(keyPrefix + i, "val");
    }
  }
Wait for acknowledgment from client, verify creation time is correct
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/tier/sockets/ReliableMessagingDUnitTest.java