anchor.diff:    'package:Flutter/temp_doc.dart,package:http/browser_client.dart,package:intl/intl_browser.dart,package:matcher/mirror_matchers.dart,package:quiver/mirrors.dart,package:quiver/io.dart,package:vm_service_client/vm_service_client.dart,package:web_socket_channel/html.dart',
       '--favicon=favicon.ico',
       '--package-order', 'flutter,Dart,flutter_test,flutter_driver',
  -    '--show-warnings',
       '--auto-include-dependencies',
     ]);
  -
  -  // Explicitly list all the packages in //flutter/packages/* that are
  -  // not listed 'nodoc' in their pubspec.yaml.
  -  for (String libraryRef in libraryRefs(diskPath: true)) {
  -    dartdocArgs.add('--include-external');
  -    dartdocArgs.add(libraryRef);
  -  }
   
     String quote(String arg) => arg.contains(' ') ? "'$arg'" : arg;
     print('Executing: (cd dev/docs ; $pubExecutable ${dartdocArgs.map<String>(quote).join(' ')})');
  
positive.code:   );
    printStream(process.stderr, prefix: args['json'] ? '' : 'dartdoc:stderr: ',
      filter: args['verbose'] ? const <Pattern>[] : <Pattern>[
        RegExp(r'^[ ]+warning: generic type handled as HTML:'), // https://github.com/dart-lang/dartdoc/issues/1475
        RegExp(r'^ warning: .+: \(.+/\.pub-cache/hosted/pub.dartlang.org/.+\)'), // packages outside our control
      ],
    );
  
negative.code: }
  
  /// Returns import or on-disk paths for all libraries in the Flutter SDK.
  Iterable<String> libraryRefs() sync* {
    for (Directory dir in findPackages()) {
      final String dirName = path.basename(dir.path);
      for (FileSystemEntity file in Directory('${dir.path}/lib').listSync()) {
        if (file is File && file.path.endsWith('.dart')) {
          yield '$dirName/${path.basename(file.path)}';
        }
      }
    }
  
    // Add a fake package for platform integration APIs.
    yield 'platform_integration/android.dart';
    yield 'platform_integration/ios.dart';
  }
  
  void printStream(Stream<List<int>> stream, { String prefix = '', List<Pattern> filter = const <Pattern>[] }) {
  