EX_IMPL
return EX_IMPL(new_class)();
EX_IMPL(cleanup)();
ret = EX_IMPL(get_new_index)(class_index,
return EX_IMPL(new_ex_data)(class_index, obj, ad);
return EX_IMPL(dup_ex_data)(class_index, to, from);
EX_IMPL(free_ex_data)(class_index, obj, ad);