const gchar *color_name,
GdkRGBA *color);
-G_CONST_RETURN GtkWidgetPath * gtk_theming_engine_get_path (GtkThemingEngine *engine);
+const GtkWidgetPath * gtk_theming_engine_get_path (GtkThemingEngine *engine);
gboolean gtk_theming_engine_has_class (GtkThemingEngine *engine,
const gchar *style_class);