def box_pack_2d(boxes: list):
    """Returns the normal of the 3D tri or quad. 

    :param boxes: list of boxes, each box is a list where the first 4 items are [x, y, width, height, …] other items are ignored. 
    :type boxes: list
    :return:  the width and height of the packed bounding box 
    """
    pass
