-GObject * get_object_assert (GtkBuilder *builder, const gchar *name);
-GtkWidget * get_widget_assert (gpointer x, const gchar *name);
+GObject *get_object_assert (GtkBuilder *builder, const gchar *name, GType type);
+GtkAction * get_action_assert (GtkBuilder *builder, const gchar *name);
+GtkWidget * get_widget_assert (GtkBuilder *builder, const gchar *name);