The object-set-name-string function of eieio has changed to
eieio-object-set-name-string, at one point my
code (ergoemacs-mode) depended on that function, so I had to use a macro to
pick the right version for different versions of emacs.

You may keep it or change it as you wish.  Today ergoemacs-mode no longer
uses this function.

Just an FYI, prompted by Stefan.

Matt