@Override
    public void afterUpdate(EntryEvent event) {
      if (!success) {
        System.out.println("WE WIN!");
        success = true;
      } else {
        fail("Should have only had one update");
      }
    }
@return first key found on the given member
geode-cq/src/distributedTest/java/org/apache/geode/internal/cache/RemoteCQTransactionDUnitTest.java