@Override
      public Object call() {
        Region cust = getCache().getRegion(CUSTOMER);
        TXManagerImpl mgr = getCache().getTxManager();
        mgr.begin();
        cust.put(new CustId(6), new Customer("customer6", "address6"));
        return null;
      }
@return first key found on the given member
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/RemoteTransactionDUnitTest.java