anchor.diff:  Future<bool> validateLibrary(Directory dir) async {
     final libName = path.basename(dir.path);
   
  +  final analysisHelper = AnalysisHelper(libName);
  +
     print('## dart:$libName');
     print('');
   
  
positive.code:   }
  
    var visitor = ValidateCommentCodeSamplesVisitor(
      coreLibName,
      file.path,
      parseResult.lineInfo,
  
negative.code:       }
      }
  
      final result = await analysisHelper.resolveFile(text);
  
      if (result is ResolvedUnitResult) {
        // Filter out unused imports, since we speculatively add imports to some
  