private static void OverrideShutdownCancelled(GLib.GType gtype)
 {
     if (ShutdownCancelledVMCallback == null)
     {
         ShutdownCancelledVMCallback = new ShutdownCancelledVMDelegate(shutdowncancelled_cb);
     }
     gnomesharp_client_override_shutdown_cancelled(gtype.Val, ShutdownCancelledVMCallback);
 }
 static extern void gnomesharp_client_override_shutdown_cancelled(IntPtr gtype, ShutdownCancelledVMDelegate cb);