public Object clone() {

        ColumnInfoRecord rec = new ColumnInfoRecord();

        rec.field_1_first_col = field_1_first_col;

        rec.field_2_last_col = field_2_last_col;

        rec.field_3_col_width = field_3_col_width;

        rec.field_4_xf_index = field_4_xf_index;

        rec.field_5_options = field_5_options;

        rec.field_6_reserved = field_6_reserved;

        return rec;

    }

    public Object clone() {

        MergeCellsRecord rec = new MergeCellsRecord();

        rec.field_1_num_areas = field_1_num_areas;

        rec.field_2_regions = field_2_regions;

        return rec;

    }

    public Object clone() {

        ProtectRecord rec = new ProtectRecord();

        rec.field_1_protect = field_1_protect;

        return rec;

    }