memory management

[Kresimir Culin <kresimir culin zd htnet hr>]

Does Gtk::Object or Glib::Object or some other class
suport

add_child_object(Gtk::Object * obj)

or something similar.

I don't understand what manage() does,
maybe I could use manage.

I need parent object (high in object tree as possible)
that can free child objects when deleted.