yRangePadding (yRangePadding) {
        if (!arguments.length) {
            return this._yRangePadding;
        }
        this._yRangePadding = yRangePadding;
        return this;
    }
Get or set the amount of padding to add, in pixel coordinates, to the top and
bottom of the chart to accommodate box/whisker labels.
@example
// allow more space for a bigger whisker font
chart.yRangePadding(12);
@param {Function} [yRangePadding = 8]
@returns {Number|Function|BoxPlot}