anchor.diff: -// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
  +// Copyright (c) 2016, 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.
   
  
positive.code: 
      if (path.length < 4) return null;
  
      // Remove the `/lib` dir.
      var p = _pkgPath + path.substring(4) + '_';
  
  
negative.code: /**
   * This `DartSdk` implementation reads the SDK resources encoded into the
   * `compiler_unsupported` package as part of a build step. This does not rely
   * on being able to locate an SDK on disk. It _does_ need to have a .packages
   * file in the working directory
   */
  class DartSdkIO implements DartSdk {
  //  static final _pkgPath = 'packages/compiler_unsupported/sdk';
    static String _pkgPath;
  
    Map<String, String> _cache = {};
    ZLibCodec _zlib = new ZLibCodec();
  