return _columnDescription;
    }

    public ColumnInfo columnExcludedDocUrls() {
        return _columnExcludedDocUrls;
    }

    public ColumnInfo columnExcludedUrls() {
        return _columnExcludedUrls;
    }

    public ColumnInfo columnIncludedDocUrls() {
        return _columnIncludedDocUrls;
    }

    public ColumnInfo columnIncludedUrls() {