anchor.diff:    String get _sourceFilePath {
       var node = element.computeNode();
       if (node is Declaration && (node as Declaration).element != null) {
  -      return (node as Declaration).element.source.uri.path;
  +      return ((node as Declaration).element.source as FileBasedSource)
  +          .file
  +          .toString();
       } else {
         return null;
       }
  
positive.code: import 'cache.dart';
  
  import '../markdown_processor.dart' show Documentation, renderMarkdownToHtml;
  
  int byName(Nameable a, Nameable b) =>
      a.name.toUpperCase().compareTo(b.name.toUpperCase());
  
negative.code:     if (_lineNumber != null && _sourceFilePath != null) {
        String packageName = library.package.isSdk ? "sdk" : library.package.name;
        String packageVersion = library.package.version;
        var root = "${library.package.packageMeta.resolvedDir}/lib"
            .replaceAll("\\", "/");
        var sourceFilePath = _sourceFilePath
            .replaceAll("\\", "/")
            .replaceAll(root, "")
  