Get rid of all the library tags.

lib/src/utils.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 json_rpc_2.utils;
-
 import 'dart:async';
 
 import 'package:stack_trace/stack_trace.dart';
 
 typedef ZeroArgumentFunction();
 
 /// Like [new Future.sync], but automatically wraps the future in a
 /// [Chain.track] call.
 Future syncFuture(callback()) => Chain.track(new Future.sync(callback));
 
@@ skipping 62 matching lines @@
   Future get done => _inner.done;
 
   _MappedStreamSink(this._inner, this._callback);
 
   void add(event) => _inner.add(_callback(event));
   void addError(error, [StackTrace stackTrace]) =>
       _inner.addError(error, stackTrace);
   Future addStream(Stream stream) => _inner.addStream(stream.map(_callback));
   Future close() => _inner.close();
 }