Import analysis_services.dart into analysis_server.dart.

pkg/analysis_services/lib/json.dart

-// Copyright (c) 2014, 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 services.json;
-
-/**
- * Instances of the class [HasToJson] implement [toJson] method that returns
- * a JSON presentation.
- */
-abstract class HasToJson {
-  /**
-   * Returns a JSON presentation of the object.
-   */
-  Map<String, Object> toJson();
-}
-
-
-/**
- * Returns a JSON presention of [value].
- */
-objectToJson(Object value) {
-  if (value is HasToJson) {
-    return value.toJson();
-  }
-  if (value is Iterable) {
-    return value.map((item) => objectToJson(item)).toList();
-  }
-  return value;
-}