+ Lisp_Object (*own_selection_method)(Lisp_Object selection_name, Lisp_Object selection_value);
+ void (*disown_selection_method)(Lisp_Object selection_name, Lisp_Object timeval);
+ Lisp_Object (*get_foreign_selection_method) (Lisp_Object selection_symbol,
+ Lisp_Object target_type);
+ Lisp_Object (*selection_exists_p_method)(Lisp_Object selection_name);