Teemu Likonen [2016-02-07 12:10:55+02] wrote:

> Are there established practices for writing a compatibility code in
> situations like this? Perhaps calling a custom function
> wcheck--fontify-region and having code like below?

There are some "alias wrappers" like below in Emacs code so maybe I'll
use similar with wcheck-mode.

    (eval-when-compile
      (defalias 'wcheck--fontify-region
        (if (fboundp 'font-lock-ensure)
            'font-lock-ensure
          'font-lock-fontify-region)))