can
Filter for which picked objects this callback wants to drag. The detector arms the drag gesture only when this returns true. The drag plumbing later casts userObject to earth.worldwind.shape.Movable internally before invoking moveTo, so returning true for a non-Movable simply yields a no-op drag (no error).
Return
true if drag events should be reported for userObject.
Parameters
user
the top picked object's earth.worldwind.PickedObject.userObject.