target defaults to current-year ES version:
Россиянам раскрыли способ упаковки вещей в ручную кладь по методу «судоку»20:51，推荐阅读PDF资料获取更多信息
Что думаешь? Оцени!。PDF资料对此有专业解读
(These techniques are very powerful. Not only can I change the constraints I’m proving on demand, but I can also perform proofs that reference multiple different credentials at the same time. For example, I might prove that I have a driver’s license, and also that by digitally-signed credit report indicates that I have a credit rating over 700.)，推荐阅读PDF资料获取更多信息
正确做法： 用 java.util.concurrent.locks.ReentrantLock 代替 synchronized，因为 Lock 的等待可以被 JVM 处理为可卸载。