anchor.diff:      'End Date'
     ];
   
  +
     /// Waits for Office APIs to be ready and then creates
     /// a new spreadsheet with [sheetName] and populates the spreadsheet with
     /// entries in the [insertionOrderList].
  
positive.code: 
    static const _borderStyle = 'Continuous';
    static const _currencyFormat = '\$#,##0.00';
  
    /// Column addresses calculated based on [_tableHeader].
    static final _spentColumn =
  
negative.code:       Util.convertMicrosToStandardUnitString(
            Int64.parseInt(budgetAmountMicros));
  
    /// Converts proto [Date] into Excel date time format.
    static String _calculateDate(
            InsertionOrder_Budget_BudgetSegment_DateRange_Date date) =>
        '${date.month}/${date.day}/${date.year} $_timeFormat';
  }
  
  /// Below are wrapper functions for Office Excel APIs.
  