Very simple version of Isolates.

runtime/tests/vm/dart/isolate_mirror_local_test.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.
 //
 // Dart test program for checking implemention of MirrorSystem when
 // inspecting the current isolate.
 //
 // VMOptions=--enable_type_checks
 
 library isolate_mirror_local_test;
@@ skipping 477 matching lines @@
   expectedTests = new Set<String>.from(['testRootLibraryMirror',
                                         'testLibrariesMap',
                                         'testMirrorSystem',
                                         'testIntegerInstanceMirror',
                                         'testStringInstanceMirror',
                                         'testBoolInstanceMirror',
                                         'testNullInstanceMirror',
                                         'testCustomInstanceMirror']);
 
   // Test that an isolate can reflect on itself.
-  mirrorSystemOf(exit_port.toSendPort()).then(testMirrorSystem);
+  mirrorSystemOf(exit_port.sendPort).then(testMirrorSystem);
 
   testIntegerInstanceMirror(reflect(1001));
   testStringInstanceMirror(reflect('This\nis\na\nString'));
   testBoolInstanceMirror(reflect(true));
   testNullInstanceMirror(reflect(null));
   testCustomInstanceMirror(reflect(new MyClass(17)));
 }