elasticY (elasticY) {
        if (!arguments.length) {
            return this._yElasticity;
        }
        this._yElasticity = elasticY;
        return this;
    }
Turn on/off elastic y axis behavior. If y axis elasticity is turned on, then the grid chart will
attempt to recalculate the y axis range whenever a redraw event is triggered.
@param {Boolean} [elasticY=false]
@returns {Boolean|CoordinateGridMixin}