bugfix

lib/timeline/Graph2d.js

@@ -190,7 +190,7 @@ Graph2d.prototype.getLegend = function(groupId, width, height) {
  */
 Graph2d.prototype.isGroupVisible = function(groupId) {
   if (this.linegraph.groups[groupId] !== undefined) {
-    return (this.linegraph.groups[groupId].visible && (this.options.groups.visibility[groupId] === undefined || this.options.groups.visibility[groupId] == true));
+    return (this.linegraph.groups[groupId].visible && (this.linegraph.options.groups.visibility[groupId] === undefined || this.linegraph.options.groups.visibility[groupId] == true));
   }
   else {
     return false;