I haven't added too much, but I do have ability to set margins/edge style/fill style of 9 patches. Setting the frame duration of a sprite animation.
I can also retrieve those values.
I can also retrieve the imagepoint name if I give the animation/frame/point index.
I can also retrieve the image point index if I give the animation/frame/point name.
whenever I need some capability like those I just add it to this behavior.