more progress implementing analysis server code completion

pkg/analysis_services/lib/json.dart

Index: pkg/analysis_services/lib/json.dart
diff --git a/pkg/analysis_server/lib/src/collections.dart b/pkg/analysis_services/lib/json.dart
similarity index 53%
copy from pkg/analysis_server/lib/src/collections.dart
copy to pkg/analysis_services/lib/json.dart
index 1c5fefc17d7ce90dc79a66af4858d676e7a584c7..462bea826462b4aca0b825fd57be5404a2b50d11 100644
--- a/pkg/analysis_server/lib/src/collections.dart
+++ b/pkg/analysis_services/lib/json.dart
@@ -2,21 +2,7 @@
 // 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 collections;
-
-/**
- * Returns the concatentation of the input iterables.
- *
- * The returned iterable is a lazily-evaluated view on the input iterables.
- */
-Iterable concat(Iterable<Iterable> iterables) => iterables.expand((x) => x);
-
-
-/**
- * Returns the concatentation of the input iterables as a [List].
- */
-List concatToList(Iterable<Iterable> iterables) => concat(iterables).toList();
-
+library services.json;
 
 /**
  * Instances of the class [HasToJson] implement [toJson] method that returns