（四）在铁路、城市轨道交通线路上私设道口或者平交过道的。
err(_) = return none,
。关于这个话题，新收录的资料提供了深入分析
At night, your smart home assistant can dim the lights, play calming music, and drop the temp before bed. Come morning, turn on the lights, raise the blinds, and get some music going. For extra credit, use a smart sunrise alarm clock to help wake up naturally.
* <p2. CompletableFuture ManagedBlocker：在 FJP 中 get() 时触发补偿