SCM get_property_alist_chain (SCM) const;
SCM internal_get_property (SCM symbol) const;
SCM internal_get_property_data (SCM symbol) const;
+ SCM internal_get_non_callback_marker_property_data (SCM symbol) const;
SCM internal_get_object (SCM symbol) const;
void internal_set_object (SCM sym, SCM val);
void internal_del_property (SCM symbol);