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    This function is obsolete since 24.4;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.