gtk_widget_set_rc_style(widget);
setup_widget_prototype(GtkWidget* widget){    static GtkWidget* protoLayout;    if (!gProtoWindow) {        gProtoWindow = gtk_window_new(GTK_WINDOW_POPUP);        protoLayout = gtk_fixed_new();        gtk_container_add(GTK_CONTAINER(gProtoWindow), protoLayout);    }    gtk_container_add(GTK_CONTAINER(protoLayout), widget);    gtk_widget_set_rc_style(widget);    gtk_widget_realize(widget);    return MOZ_GTK_SUCCESS;}