Very simple version of Isolates.

tests/standalone/package/sibling_isolate.dart

 
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library sibling_isolate;
 
 import 'package:shared.dart'as shared;
 import 'dart:isolate';
 
 // This file is spawned from package_isolate_test.dart
-main() {
+main(List<String args>, SendPort reply) {
   shared.output = 'isolate';
-  port.receive((msg, replyTo) {
-    replyTo.send(shared.output);
-  });
+  reply.send(shared.output);
 }