MoreExecutors
MoreExecutors.addDelayedShutdownHook( ExecutorService, long, TimeUnit)
MoreExecutors.daemonThreadFactory()
MoreExecutors.daemonThreadFactory(ThreadFactory)
MoreExecutors.getExitingExecutorService( ThreadPoolExecutor)
MoreExecutors.getExitingExecutorService( ThreadPoolExecutor, long, TimeUnit)
MoreExecutors.getExitingScheduledExecutorService( ScheduledThreadPoolExecutor)
MoreExecutors.getExitingScheduledExecutorService( ScheduledThreadPoolExecutor, long, TimeUnit)
MoreExecutors.sameThreadExecutor()