public static void closeCache() {
    if (cache != null && !cache.isClosed()) {
      cache.close();
      cache.getDistributedSystem().disconnect();
    }
  }
Verify that EventId is prapogated to server in case of region clear. It also checks that peer
nodes also get the same EventID.
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/tier/sockets/EventIDVerificationDUnitTest.java