anchor.diff:  
   import 'package:analyzer/dart/ast/ast.dart';
   import 'package:analyzer/dart/ast/visitor.dart';
  -import 'package:analyzer/error/error.dart';
  -import 'package:analyzer/error/listener.dart';
   import 'package:analyzer/src/lint/registry.dart';
   
   import 'package:github/server.dart';
  
positive.code: 
    void forEach(void f(LintScore element)) {
      scores.forEach(f);
    }
  
    static Future<List<String>> _getLintsWithFixes() async {
  
negative.code:     var flutterRuleset = await flutterRules;
      var flutterRepoRuleset = await flutterRepoRules;
      var pedanticRuleset = await pedanticRules;
  
      var issues = await _getIssues();
      var bugs = issues.where(_isBug).toList();
  