builder.setCrashSafeMode(CRASH_SAFE_MODE);
final IFilePersistence filePersistence = builder.build();
final IDataAccessSession session = filePersistence
.createDataAccessSession();
session.open();
session.setObject("key", new EmptyClass());
session.close(EnumFilePersistenceCloseAction.SAVE);
printState(filePersistence);
filePersistence.garbageSweep("runtime/set");