anchor.diff:  class ExcelDart {
     /// Underpacing table addresses.
     static const _underpacingTableAddress = 'A1:B2';
  -  static const _underpacingHeaderAddress = 'A1:A2';
  -  static const _underpacingValueAddress = 'B1:B2';
  -  static const _thresholdAddress = '\$B2';
  +  static const _highlightOptionAddress = '\$B\$1';
  +  static const _thresholdAddress = '\$B\$2';
   
     /// `false` will be replaced in [ExcelDart.populate] with the correct value.
     /// Default threshold is set to 0.9.
     static final _underpacingTable = [
  -    ['highlight underpacing:', false],
  -    ['threshold:', 0.9]
  +    ['highlight underpacing insertion orders', false],
  +    ['threshold', 0.9]
     ];
   
     /// Excel 'bad' preset formats.
  
positive.code:       // Adds and formats the underpacing table.
        _underpacingTable[0][1] = highlightUnderpacing;
        sheet.getRange('$sheetName!$_underpacingTableAddress')
          ..format.font.name = _fontName
          ..format.font.size = _fontSize
          ..format.font.bold = true
          ..format.horizontalAlignment = _centerAlignment
          ..values = _underpacingTable;
        sheet
            .getRange('$sheetName!$_underpacingHeaderAddress')
            .format
            .horizontalAlignment = _leftAlignment;
        sheet
            .getRange('$sheetName!$_underpacingValueAddress')
            .format
            .horizontalAlignment = _rightAlignment;
  
        // Turns [insertionOrderList] into table rows.
        final tableBody = insertionOrderList.map(_generateTableRow).toList();
  
negative.code:           '$_resultTableColumnStartAddress$_resultTableRowStartAddress:'
            '$endAddress';
        final table = context.workbook.tables.add(tableAddress, true);
        table
          ..name = tableName
          ..style = _tableStyle;
  
        // Adds and formats table header.
        table.getHeaderRowRange()
          ..values = [_tableHeader]
          ..format.font.bold = true
          ..format.horizontalAlignment = _centerAlignment
          ..format.borders.getItem('EdgeTop').style = _borderStyle
          ..format.borders.getItem('EdgeBottom').style = _borderStyle;
  
        // Adds and formats table body.
        table.getDataBodyRange().formulas = tableBody;
  
        // Formats the Daily Max column as currency.
        table.columns.getItem(_dailyMaxColumnName).getRange().numberFormat =
            _currencyFormat;
  
        // Center all columns except for display name column(default to left
        // align), and all columns related to numbers(default to right align).
        for (final columnName in _tableHeader) {
          if (columnName != _displayNameColumnName &&
              columnName != _budgetColumnName &&
              columnName != _spentColumnName &&
              columnName != _currentPacingColumnName &&
              columnName != _dailyMaxColumnName &&
              columnName != _dailyMaxImpressionColumnName) {
            table.columns
                .getItem(columnName)
                .getRange()
                .format
                .horizontalAlignment = _centerAlignment;
          }
        }
  
        // Auto-fits all used cells.
        sheet.getUsedRange().getEntireColumn().format.autofitColumns();
  