Casting Glib::RefPtr

["Germán Diago" <germandiago gmail com>]

Hello. This piece of code doesn't compile:


	Glib::RefPtr<Gtk::Builder> b = Gtk::Builder::create_from_file("prueba.ui");

	Gtk::Window * w;
	Gtk::TreeView * view;
	Glib::RefPtr<Glib::Object> liststore;

	b->get_widget("window1", w);
	//Glib::RefPtr<Glib::Object>::cast_static<Gtk::ListStore>(b->get_object("liststore"));

	Glib::RefPtr<Glib::Object> o = b->get_object("liststore");
	
        //This line is the one that does not compile
        Glib::RefPtr<Glib::Object>::cast_static<Gtk::ListStore>(o);


I want to cast to a liststore an object in the last line, but I can't.
Which is the correct way to do it?