c-guess-no-install
c-guess-no-install is an interactive autoloaded compiled Lisp function in `cc-guess.el
'.
(c-guess-no-install &optional ACCUMULATE)
Guess the style in the region up to `c-guess-region-max'; don't install it.
If given a prefix argument (or if the optional argument ACCUMULATE is
non-nil) then the previous guess is extended, otherwise a new guess is
made from scratch.