- DECLARE_SCHEME_CALLBACK (preset_extent, (SCM smob, SCM axis));
- DECLARE_SCHEME_CALLBACK (point_dimension_callback, (SCM smob, SCM axis));
- DECLARE_SCHEME_CALLBACK (molecule_extent, (SCM smob, SCM axis));
-
-
- static SCM ly_set_grob_property (SCM, SCM,SCM);
- static SCM ly_get_grob_property (SCM, SCM);
-
- bool has_interface (SCM intf);
- void set_interface (SCM intf);