static new LockedVar<WatchService> jdk_defaultWatchService_instance;

static WatchService jdk_defaultWatchService() {
  lock jdk_defaultWatchService_instance.lock;
  if (!jdk_defaultWatchService_instance.has())
    jdk_defaultWatchService_instance.set(jdk_newWatchService());
  ret jdk_defaultWatchService_instance!;
}

svoid cleanMeUp_jdk_defaultWatchService {
  closeAutoCloseable(jdk_defaultWatchService_instance!);
}

Began life as a copy of #1019341