public RingbufferConfig setAsyncBackupCount(int asyncBackupCount) {
        this.asyncBackupCount = checkAsyncBackupCount(backupCount, asyncBackupCount);
        return this;
    }
@Test(expected = IllegalArgumentException.class)
    public void setAsyncBackupCount_whenTooLarge() {
        RingbufferConfig config = new RingbufferConfig(NAME);

        config.setAsyncBackupCount(MAX_BACKUP_COUNT + 1);
    }