+
+class Rest_collision
+{
+public:
+ static void add_column (Grob*me, Grob*);
+
+ static bool has_interface (Grob*);
+ DECLARE_SCHEME_CALLBACK (force_shift_callback, (SCM element, SCM axis));
+ DECLARE_SCHEME_CALLBACK (force_shift_callback_rest, (SCM element, SCM axis));
+ static SCM do_shift (Grob*);