The face-link Widget

Syntax:

type ::= (face-link [keyword argument]...  face)

A widget to represent a link to an Emacs face. Its super is the link widget.

It overrides the :action property, to a function to describe face.

Example:

(widget-create 'face-link
               :button-prefix ""
               :button-suffix ""
               :tag "Which face is this one?"
               'widget-button)