/**
* Update the list of annotations and redraw the chart.
+ * See dygraphs.com/annotations.html for more info on how to use annotations.
+ * @param ann {Array} An array of annotation objects.
+ * @param suppressDraw {Boolean} Set to "true" to block chart redraw (optional).
*/
Dygraph.prototype.setAnnotations = function(ann, suppressDraw) {
// Only add the annotation CSS rule once we know it will be used.