anchor.diff:    }
   }
   
  -/**
  - * Options used by a [ContextBuilder].
  - */
  +/// Options used by a [ContextBuilder].
   class ContextBuilderOptions {
  -  /**
  -   * The results of parsing the command line arguments as defined by
  -   * [defineAnalysisArguments] or `null` if none.
  -   */
  +  /// The results of parsing the command line arguments as defined by
  +  /// [defineAnalysisArguments] or `null` if none.
     ArgResults argResults;
   
  -  /**
  -   * The file path of the file containing the summary of the SDK that should be
  -   * used to "analyze" the SDK. This option should only be specified by
  -   * command-line tools such as 'dartanalyzer' or 'ddc'.
  -   */
  +  /// The file path of the file containing the summary of the SDK that should be
  +  /// used to "analyze" the SDK. This option should only be specified by
  +  /// command-line tools such as 'dartanalyzer' or 'ddc'.
     String dartSdkSummaryPath;
   
  -  /**
  -   * The file path of the analysis options file that should be used in place of
  -   * any file in the root directory or a parent of the root directory, or `null`
  -   * if the normal lookup mechanism should be used.
  -   */
  +  /// The file path of the analysis options file that should be used in place of
  +  /// any file in the root directory or a parent of the root directory, or `null`
  +  /// if the normal lookup mechanism should be used.
     String defaultAnalysisOptionsFilePath;
   
  -  /**
  -   * A table mapping variable names to values for the declared variables, or
  -   * `null` if no additional variables should be declared.
  -   */
  +  /// A table mapping variable names to values for the declared variables, or
  +  /// `null` if no additional variables should be declared.
     Map<String, String> declaredVariables;
   
  -  /**
  -   * The default analysis options that should be used unless some or all of them
  -   * are overridden in the analysis options file, or `null` if the default
  -   * defaults should be used.
  -   */
  +  /// The default analysis options that should be used unless some or all of them
  +  /// are overridden in the analysis options file, or `null` if the default
  +  /// defaults should be used.
     AnalysisOptions defaultOptions;
   
  -  /**
  -   * The file path of the .packages file that should be used in place of any
  -   * file found using the normal (Package Specification DEP) lookup mechanism,
  -   * or `null` if the normal lookup mechanism should be used.
  -   */
  +  /// The file path of the .packages file that should be used in place of any
  +  /// file found using the normal (Package Specification DEP) lookup mechanism,
  +  /// or `null` if the normal lookup mechanism should be used.
     String defaultPackageFilePath;
   
  -  /**
  -   * The file path of the packages directory that should be used in place of any
  -   * file found using the normal (Package Specification DEP) lookup mechanism,
  -   * or `null` if the normal lookup mechanism should be used.
  -   */
  +  /// The file path of the packages directory that should be used in place of any
  +  /// file found using the normal (Package Specification DEP) lookup mechanism,
  +  /// or `null` if the normal lookup mechanism should be used.
     String defaultPackagesDirectoryPath;
   
  -  /**
  -   * A list of the paths of summary files that are to be used, or `null` if no
  -   * summary information is available.
  -   */
  +  /// A list of the paths of summary files that are to be used, or `null` if no
  +  /// summary information is available.
     List<String> librarySummaryPaths;
   
  -  /**
  -   * Initialize a newly created set of options
  -   */
  +  /// Initialize a newly created set of options
     ContextBuilderOptions();
   }
   
  -/**
  - * Given a package map, check in each package's lib directory for the existence
  - * of an `_embedder.yaml` file. If the file contains a top level YamlMap, it
  - * will be added to the [embedderYamls] map.
  - */
  +/// Given a package map, check in each package's lib directory for the existence
  +/// of an `_embedder.yaml` file. If the file contains a top level YamlMap, it
  +/// will be added to the [embedderYamls] map.
   class EmbedderYamlLocator {
  -  /**
  -   * The name of the embedder files being searched for.
  -   */
  +  /// The name of the embedder files being searched for.
     static const String EMBEDDER_FILE_NAME = '_embedder.yaml';
   
  -  /**
  -   * A mapping from a package's library directory to the parsed YamlMap.
  -   */
  +  /// A mapping from a package's library directory to the parsed YamlMap.
     final Map<Folder, YamlMap> embedderYamls = HashMap<Folder, YamlMap>();
   
  -  /**
  -   * Initialize a newly created locator by processing the packages in the given
  -   * [packageMap].
  -   */
  +  /// Initialize a newly created locator by processing the packages in the given
  +  /// [packageMap].
     EmbedderYamlLocator(Map<String, List<Folder>> packageMap) {
       if (packageMap != null) {
         _processPackageMap(packageMap);
       }
     }
   
  -  /**
  -   * Initialize with the given [libFolder] of `sky_engine` package.
  -   */
  +  /// Initialize with the given [libFolder] of `sky_engine` package.
     EmbedderYamlLocator.forLibFolder(Folder libFolder) {
       _processPackage([libFolder]);
     }
   
  -  /**
  -   * Programmatically add an `_embedder.yaml` mapping.
  -   */
  +  /// Programmatically add an `_embedder.yaml` mapping.
     void addEmbedderYaml(Folder libDir, String embedderYaml) {
       _processEmbedderYaml(libDir, embedderYaml);
     }
   
  -  /**
  -   * Refresh the map of located files to those found by processing the given
  -   * [packageMap].
  -   */
  +  /// Refresh the map of located files to those found by processing the given
  +  /// [packageMap].
     void refresh(Map<String, List<Folder>> packageMap) {
       // Clear existing.
       embedderYamls.clear();
  
positive.code:     return workspace.createSourceFactory(sdk, summaryData);
    }
  
    /**
     * Add any [declaredVariables] to the list of declared variables used by the
     * given analysis [driver].
     */
    void declareVariablesInDriver(AnalysisDriver driver) {
      Map<String, String> variables = builderOptions.declaredVariables;
      if (variables != null && variables.isNotEmpty) {
  
negative.code:     return options;
    }
  
    /// Return the analysis options file that should be used when analyzing code in
    /// the directory with the given [path].
    ///
    /// If [forceSearch] is true, then don't return the default analysis options
    /// path. This allows cli to locate what *would* have been the analysis options
    /// file path, and super-impose the defaults over it in-place.
    File getOptionsFile(String path, {bool forceSearch = false}) {
      if (!forceSearch) {
        String filePath = builderOptions.defaultAnalysisOptionsFilePath;
  