static void GetExtents_cb(IntPtr inst, out int x, out int y, out int width, out int height, int coord_type)
 {
     try {
         IComponentImplementor __obj = GLib.Object.GetObject(inst, false) as IComponentImplementor;
         __obj.GetExtents(out x, out y, out width, out height, (Atk.CoordType)coord_type);
     } catch (Exception e) {
         GLib.ExceptionManager.RaiseUnhandledException(e, true);
         // NOTREACHED: above call does not return.
         throw e;
     }
 }