My misunderstanding.
On Jul 6, 2014 1:01 PM, "Glenn Morris" <rgm@gnu.org> wrote:

>
> emacs-24.3.92 -Q -l eieio
>
> C-h f object-set-name-string
>
>     object-set-name-string is an alias for `eieio-object-set-name-string'
>     in `eieio.el'.
>
>     (object-set-name-string OBJ NAME)
>
>     This function is obsolete since 24.4;
>     use `eieio-object-set-name-string' instead.
>