elasticRadius (elasticRadius) {
        if (!arguments.length) {
            return this._elasticRadius;
        }
        this._elasticRadius = elasticRadius;
        return this;
    }
Turn on or off the elastic bubble radius feature, or return the value of the flag. If this
feature is turned on, then bubble radii will be automatically rescaled to fit the chart better.
@memberof BubbleMixin
@instance
@param {Boolean} [elasticRadius=false]
@returns {Boolean|BubbleChart}