@IF@ has_string_type @THEN@
free_multiple_string_field (@structure@->@opt_var@_given, &(@structure@->@opt_var@_arg), &(@structure@->@opt_var@_orig));
@ELSE@
free_multiple_field (@structure@->@opt_var@_given, (void *)(@structure@->@opt_var@_arg), &(@structure@->@opt_var@_orig));
@structure@->@opt_var@_arg = 0;
@ENDIF@