anchor.diff:        sheet.getUsedRange().getEntireColumn().format.autofitColumns();
         sheet.getUsedRange().getEntireRow().format.autofitRows();
   
  -      // Sets the sheet as active and syncs context.
  +      // Sets the sheet as active.
         sheet.activate();
  -      context.sync();
   
         // All operations are complete.
         populateCompleter.complete();
  +
  +      return context.sync();
       }));
   
       // Waits for population to be complete.
  
positive.code: 
        format.custom.format.numberFormat = _currencyFormat;
  
        context.sync();
  
        // All operations are complete.
        formatCompleter.complete();
      }));
  
      return formatCompleter.future;
  
negative.code: class ExcelJS {
    /// Executes a batch script that performs actions
    /// on the Excel object model using a new RequestContext.
    external static void run(dynamic Function(RequestContext) callback);
  }
  
  /// Wrapper for Excel.RequestContext class.
  