This widget provides similar functionality to that in Gnome.DruidPageEdge. It is used for pages that are not the initial or terminal pages of a druid.

The main difference between an edge and a standard druid page (in a display sense) is that standard pages do not have a left-side watermark and the body of the contents section is a bit more arbitrary (it is a GTK.VBox widget), rather than just displaying text (which is the common case for edge pages).