public static Tween parallel(Tween... delegates) {
        return new Parallel(delegates);
    }
Creates a tween that will interpolate over an entire list
of tweens in parallel, ie: all tweens will be run at the same
time.

@param delegates the tweens to be interpolated
@return a new instance
jme3-core/src/main/java/com/jme3/anim/tween/Tweens.java