gridLinesVisible() {
        const sheetViewNode = this._getOrCreateSheetViewNode();
        return new ArgHandler('Sheet.gridLinesVisible')
            .case(() => {
                return sheetViewNode.attributes.showGridLines === 1 || sheetViewNode.attributes.showGridLines === undefined;
            })
            .case('boolean', visible => {
                sheetViewNode.attributes.showGridLines = visible ? 1 : 0;
                return this;
            })
            .handle(arguments);
    }
Sets whether this sheet's grid lines are visible.
@param {boolean} selected - True to make visible, false to hide.
@returns {Sheet} The sheet.