[gtkmm] Gtk::Style virtual draw_ methods timeline?

[Patrick Crosby <pcrosby pobox com>]

in looking at gtkmm/style.h, i noticed the following comment:

// This wrapper is very temporary.  There should be a new
// replacement for this at some point when gtk+ adds a data 
// field.  For now only setting the colors works.  When
// gtk+ gets field, all draw_* become virtual and one can define
// their own style in C++.
class Style : public Glib::Object

any idea when gtk+ is going to have the data field and thus when this
will have virtual draw_* methods?

thanks.

patrick