/** @type {Array.<{elem:Element,type:string,fn:function(!Event):(boolean|undefined|null)}>} */
Dygraph.prototype.registeredEvents_;
+
+/** @type {Object} */
+Dygraph.DEFAULT_ATTRS;
+
+/**
+ * @typedef {function(
+ * (number|Date),
+ * number,
+ * function(string):*,
+ * (Dygraph|undefined)
+ * ):string}
+ */
+Dygraph.AxisLabelFormatter;