The widget allows drawing into same collaborative sketching canvas for multiple users and each of them will be assigned with their own color. When anyone of the users edit the sketch its automaticly pushed for all the other users. When you use this component you should handle CollabSketchLineContainer-class and share it between each instance of the server-side component. If you want to share the canvas for all the users you should make the CollabSketchLineContainer-instance as singleton.