anchor.diff:  import 'package:analysis_server/src/protocol_server.dart' as protocol;
   import 'package:analysis_server/src/server/crash_reporting_attachments.dart';
   import 'package:analysis_server/src/server/diagnostic_server.dart';
  +import 'package:analysis_server/src/server/error_notifier.dart';
   import 'package:analysis_server/src/services/completion/completion_performance.dart'
       show CompletionPerformance;
   import 'package:analysis_server/src/services/refactoring/refactoring.dart';
  
positive.code: import 'package:analyzer/src/context/context_root.dart';
  import 'package:analyzer/src/dart/analysis/driver.dart' as nd;
  import 'package:analyzer/src/dart/analysis/status.dart' as nd;
  import 'package:analyzer/src/generated/sdk.dart';
  import 'package:analyzer_plugin/protocol/protocol_common.dart' as plugin;
  import 'package:analyzer_plugin/protocol/protocol_generated.dart' as plugin;
  
negative.code:       stackTrace is StackTrace ? stackTrace : null,
        false,
      ));
  
      AnalysisEngine.instance.instrumentationService.logException(
        FatalException(
          message,
          exception,
          stackTrace,
        ),
        null,
        crashReportingAttachmentsBuilder.forException(exception),
      );
    }
  
    void onOverlayCreated(String path, String content) {
  