GtkOrientable vs property "override" (was: GtkBindingSet etc)

[Kevin Ryde <user42 zip com au>]

Torsten Schoenfeld <kaffeetisch gmx de> writes:
> But we really need to have an unstable release soon.  We are actually
> supposed to be API-frozen already.

Is the GtkOrientable bit about making a property "override" still
pending?

Coming to understand it very very slowly ... is it about making
g_object_class_override_property() available so a perl-code widget can
create itself a property which takes the pspec of the GtkOrientable?

At any rate like I said before a note in the Orientable.pod about what
to do would help, as I don't imagine I'll be the last to find it a bit
obscure.