static int Verify_cb(IntPtr inst, IntPtr identity, IntPtr trusted_ca)
 {
     try {
         TlsCertificate           __obj = GLib.Object.GetObject(inst, false) as TlsCertificate;
         GLib.TlsCertificateFlags __result;
         __result = __obj.OnVerify(GLib.SocketConnectableAdapter.GetObject(identity, false), GLib.Object.GetObject(trusted_ca) as GLib.TlsCertificate);
         return((int)__result);
     } catch (Exception e) {
         GLib.ExceptionManager.RaiseUnhandledException(e, true);
         // NOTREACHED: above call does not return.
         throw e;
     }
 }