Re: face-remapping-alist can not override internal-border face?

[martin rudalics <rudalics@gmx.at>]

 > Sorry, I do not understand this,  does this mean: test is inherited to default face,
 > so internal-border is remapped to default instead of test? but the below code
 > seem to not work too:
 >
 > (defface test
 >    '((:background "green"))
 >    "Face used by the ivy-posframe."
 >    :group 'ivy-posframe)
 >
 > (setq face-remapping-alist '((internal-border . test)))
 >
 > (make-frame '((internal-border-width . 100)))
 >
 > (redraw-display)

In a package I wrote I added a separate 'defcustom' to let users
specify the background of the internal border like

(defcustom my-internal-border "blue"
   "Background of internal border."
   :type 'string
   ...)

and later use

(set-face-background 'internal-border my-internal-border ...)

to put that into effect.  I don't recall whether I then conducted
special experiments as to whether other solutions would work but
faintly recall that the face of the internal border is special in a
way.

martin