Xacobeo::GObject3pm

        package My::Widget;
        
        use Xacobeo::GObject;
        
        Xacobeo::GObject->register_package('Gtk2::Entry' =>
                properties => [
                        Glib::ParamSpec->object(
                                'ui-manager',
                                'UI Manager',
                                "The UI Manager that provides the UI",
                                'Gtk2::UIManager',
                                ['readable', 'writable'],
                        ),
                ],
        );
        
        # Builtin constructor
        my $widget = My::Widget->new();
        
        # Set the property and fires the signal 'notify::ui-manager'
        $widget->set_ui_manager(Gtk2::UIManager->new);
        
        # Get the property
        $widget->get_ui_manager;
        
        # Direct accessor/setter (the setter doesn't fire any signal)
        $widget->ui_manager;