+ DECLARE_SCHEME_CALLBACK (y_aligned_on_support_refpoints, (SCM element));
+ DECLARE_SCHEME_CALLBACK (x_aligned_side, (SCM element));
+ DECLARE_SCHEME_CALLBACK (y_aligned_side, (SCM element));
+
+ static SCM Side_position_interface::aligned_side (Grob*me, Axis a);
+
+ static SCM general_side_position (Grob *, Axis, bool);
+ static Axis get_axis (Grob *);
+ static void set_axis (Grob *, Axis);
+ static bool has_interface (Grob *);
+ static void add_support (Grob *, Grob *);
+ static void add_staff_support (Grob *);
+ static Direction get_direction (Grob *);
+};