private static void OverrideHelp(GLib.GType gtype)
 {
     if (HelpVMCallback == null)
     {
         HelpVMCallback = new HelpVMDelegate(help_cb);
     }
     gnomesharp_druid_override_help(gtype.Val, HelpVMCallback);
 }
 static extern void gnomesharp_druid_override_help(IntPtr gtype, HelpVMDelegate cb);