(X-offset-callbacks . (,Self_alignment_interface::aligned_on_self))
(Y-offset-callbacks . (,Side_position_interface::aligned_side))
(self-alignment-X . 0)
(X-offset-callbacks . (,Self_alignment_interface::aligned_on_self))
(Y-offset-callbacks . (,Side_position_interface::aligned_side))
(self-alignment-X . 0)