Formalizing the hacks letting the angular analyzer plugin run for now.

pkg/analysis_server/lib/starter.dart

 // Copyright (c) 2015, 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 analysis_server.starter;
 
 import 'package:analysis_server/src/server/driver.dart';
+import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analyzer/instrumentation/instrumentation.dart';
 import 'package:analyzer/plugin/resolver_provider.dart';
 import 'package:plugin/plugin.dart';
 
 /**
  * An object that can be used to start an analysis server. This class exists so
  * that clients can configure an analysis server before starting it.
  *
  * Clients may not extend, implement or mix-in this class.
  */
@@ skipping 22 matching lines @@
    */
   void set packageResolverProvider(ResolverProvider provider);
 
   /**
    * Set the [plugins] that are defined outside the analysis_server package.
    */
   void set userDefinedPlugins(List<Plugin> plugins);
 
   /**
    * Use the given command-line [arguments] to start this server.
+   *
+   * At least temporarily returns AnalysisServer so that consumers of the
+   * starter API can then use the server, this is done as a stopgap for the
+   * angular plugin until the official plugin API is finished.
    */
-  void start(List<String> arguments);
+  AnalysisServer start(List<String> arguments);
 }