anchor.diff:  import 'package:analysis_server/src/constants.dart';
   import 'package:analysis_server/src/domain_analysis.dart';
   import 'package:analyzer/src/generated/engine.dart';
  +import 'package:analyzer/src/services/lint.dart';
   import 'package:test_reflective_loader/test_reflective_loader.dart';
   import 'package:unittest/unittest.dart';
   
  
positive.code:     await waitForTasksFinished();
  
      verifyStrongMode(enabled: false);
    }
  
    verifyStrongMode({bool enabled}) {
  
negative.code:     super.tearDown();
    }
  
    test_lint_options_changes() async {
      addOptionsFile('''
  linter:
    rules:
      - camel_case_types
      - constant_identifier_names
  ''');
  
      addTestFile(testSource);
      setAnalysisRoot();
  
      await waitForTasksFinished();
  
      verifyLintsEnabled(['camel_case_types', 'constant_identifier_names']);
  
      addOptionsFile('''
  linter:
    rules:
      - camel_case_types
  ''');
  
      await pumpEventQueue();
      await waitForTasksFinished();
  
      verifyLintsEnabled(['camel_case_types']);
    }
  
    test_options_file_added() async {
      addTestFile(testSource);
      setAnalysisRoot();
  