@Override
      public Object call() {
        TXManagerImpl mgr = getGemfireCache().getTxManager();
        mgr.resume(txid);
        Region<Integer, String> r = getGemfireCache().getRegion(D_REFERENCE);
        Region<CustId, Customer> pr = getGemfireCache().getRegion(CUSTOMER);
        for (int i = 5; i < 10; i++) {
          CustId custId = new CustId(i);
          Customer cust = new Customer("name" + i, "address" + i);
          getGemfireCache().getLogger().info("SWAP:AfterFailover:putting:" + custId);
          pr.put(custId, cust);
          r.put(i, "value" + i);
        }
        return mgr.suspend();
      }
test has a client, two accessors and a datastore pool connects to two accessors. we then close
the server in first accessor and verify failover
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/ClientServerTransactionDUnitTest.java