* Returns the box which the chart should be drawn in. This is the canvas's
* box, less space needed for the axis and chart labels.
*
- * @return {{ x : numer, y : number, w : number, h : number }}
+ * @return {{x: number, y: number, w: number, h: number}}
*/
DygraphLayout.prototype.getPlotArea = function() {
return this.area_;