Work in progres, please take a look and give early feedback if this is the way we want to structure…

samples/myapi/myapi_impl.dart

-// Copyright (c) 2015, the Fletch 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.md file.
-
-library myapi_impl;
-
-const myapi = const Api('MyApi');
-
-int calls = 0;
-@myapi MyObject foo() {
-  return (calls++ & 1 == 0) ? new Bar() : new Baz();
-}
-
-abstract class MyObject {
-  @myapi void funk(MyObject o);
-}
-
-class Bar implements MyObject {
-  void funk(MyObject o) {
-    print("Bar!");
-    if (o != null) o.funk(null);
-  }
-}
-
-class Baz implements MyObject {
-  void funk(MyObject o) {
-    print("Baz!");
-    if (o != null) o.funk(null);
-  }
-}
-
-
-// ---------------------------------------------------------------
-
-class Api {
-  final String name;
-  const Api(this.name);
-}