RE: [Emacs-diffs] trunk r113747: lisp/frameset.el: Convert `frameset' to vector and add new slots.

[Drew Adams]

> > frameset-p or frameset-valid-p?
> 
> Also frameset-valid-p, but that function is already autoloaded.

"Also"?

Why would we ever want someone to use `frameset-p'?  What's the
point of testing only for a possibly invalid structure that
happens to have the right tag?

Not a rhetorical question.  Do we really want people relying
on `frameset-p' (and `cl-typep') to check whether something is
of type frameset?