anchor.diff:  
   /// Resolves reference links in doc comments.
   markdown.Resolver linkResolver;
  +
  +/// Index of all the qualified names documented. 
  +Set<String> qualifiedNameIndex = new Set<String>();
   
   /**
    * Docgen constructor initializes the link resolver for markdown parsing.
  
positive.code:   
    Class(this.name, this.superclass, this.isAbstract, this.isTypedef, 
        this.comment, this.interfaces, this.variables, this.methods, 
        this.annotations);
  
    /// Generates a map describing the [Class] object.
    Map toMap() {
  
negative.code: 
    String name;
  
    Library(name, this.comment, this.variables,
        this.functions, this.classes) : super(name) {
      this.name = name; 
    }
  
    /// Generates a map describing the [Library] object.
    Map toMap() {
  