Can't Override Widget class in Gtk3

Hi:

I’m working on an upgrade to visualruby that uses gtk3!

However, I’ve run into a few problems.

In my first version of visualruby, I added to the Gtk::Widget class:

Module Gtk

class Widget

end
end

Howver, with gtk 3 I get this error/warning, and the class is not
loaded:

/home/eric/.rvm/gems/ruby-2.3.0/gems/gobject-introspection-3.0.8/lib/gobject-introspection/loader.rb:233:
warning: already initialized constant Gtk::Widget
/home/eric/.rvm/gems/ruby-2.3.0/gems/vrlib-3.0.0/lib/Widget.rb:3:
warning: previous definition of Widget was here

How do I override the Widget class?

Thanks for all your great work!

Eric