rightToLeft() {
        const sheetViewNode = this._getOrCreateSheetViewNode();
        return new ArgHandler('Sheet.rightToLeft')
            .case(() => {
                return sheetViewNode.attributes.rightToLeft;
            })
            .case('boolean', rtl => {
                if (rtl) sheetViewNode.attributes.rightToLeft = true;
                else delete sheetViewNode.attributes.rightToLeft;
                return this;
            })
            .handle(arguments);
    }
Sets whether this sheet is rtl.
@param {boolean} rtl - True to rtl, false to ltr (Left To Right).
@returns {Sheet} The sheet.