boldOutlier (show) {
        if (!arguments.length) {
            return this._boldOutlier;
        }
        this._boldOutlier = show;
        return this;
    }
Get or set whether outliers will be drawn bold.
@example
// If outliers are rendered display as bold
chart.boldOutlier(true);
@param {Boolean} [show=false]
@returns {Boolean|BoxPlot}