I’m not sure either, but it’s likely set on the object. Create an action on the object, call it from your scene (make sure you have an instance on the scene), and in the action use a JavaScript event, obtain the object with the objects array, and log the object in the JavaScript console. From there, you should be able to see all the functions present on it by inspecting it’s prototype - find the one that is named like the function you’ve made and voilà.