.rotation

[only applies to type:"rotation"] The current rotation (in degrees) of the Draggable instance. This is the rotation transform, as in the csstransform:rotate(...deg). This value is updated each time the Draggable is dragged interactively and during the momentum-based tween that Draggable applies when the user releases their mouse/touch, but if you manually change (or tween) the element's rotation you can force Draggable to look at the "real" value and record it to its own "x" property by calling the Draggable's update() method. Basically that re-synchronizes it. Again, this is not necessary unless other code (outside Draggable) alters the target element's position.
Implementation
    public function get rotation():Number