static void NextAsync_cb(IntPtr inst, IntPtr cancellable, GLibSharp.AsyncReadyCallbackNative cb, IntPtr user_data)
 {
     try {
         SocketAddressEnumerator             __obj      = GLib.Object.GetObject(inst, false) as SocketAddressEnumerator;
         GLibSharp.AsyncReadyCallbackInvoker cb_invoker = new GLibSharp.AsyncReadyCallbackInvoker(cb, user_data);
         __obj.OnNextAsync(GLib.Object.GetObject(cancellable) as GLib.Cancellable, cb_invoker.Handler);
     } catch (Exception e) {
         GLib.ExceptionManager.RaiseUnhandledException(e, false);
     }
 }
        static IntPtr Next_cb(IntPtr inst, IntPtr cancellable, out IntPtr error)
        {
            error = IntPtr.Zero;

            try {
                SocketAddressEnumerator __obj = GLib.Object.GetObject(inst, false) as SocketAddressEnumerator;
                GLib.SocketAddress      __result;
                __result = __obj.OnNext(GLib.Object.GetObject(cancellable) as GLib.Cancellable);
                return(__result == null ? IntPtr.Zero : __result.Handle);
            } catch (Exception e) {
                GLib.ExceptionManager.RaiseUnhandledException(e, true);
                // NOTREACHED: above call does not return.
                throw e;
            }
        }