var DygraphOptions = function(dygraph) {
/**
* The dygraph.
- * @type {Dygraph}
+ * @type {!Dygraph}
*/
this.dygraph_ = dygraph;
* Not optimal, but does the trick when you're only using two axes.
* If we move to more axes, this can just become a function.
*
- * @type {Object.<string, number>}
+ * @type {Object.<number>}
* @private
*/
DygraphOptions.AXIS_STRING_MAPPINGS_ = {