anchor.diff:  
     String toString() => 'Package $name, isSdk: $_isSdk';
   
  -  ModelElement getChild(String reference) {
  -    _libraries.forEach((library) {
  -      if (!library.isInSdk) {
  -        var element = library.getChild(reference);
  -        if (element != null) {
  -          return element;
  -        }
  -      }
  -    });
  -    return null;
  -  }
  -
     bool isDocumented(ModelElement e) {
       // TODO: review this logic. I'm compensating for what's probably a bug
       // see also ElementType and how an elementType is linked to a library
  
positive.code:             (element.node as AnnotatedNode).documentationComment.references;
        }
      }
  
      if (_documentation != null) {
        _documentation = _processRefs(stripComments(_documentation), commentRefs);
      }
  
negative.code:     if (lastWritten < docs.length) {
        buf.write(docs.substring(lastWritten, docs.length));
      }
      return buf.toString();
    }
  
    String toString() => '$runtimeType $name';
  
    List<String> getAnnotations() {
      List<ElementAnnotation> a = element.metadata;
  