anchor.diff:  import 'package:devtools/src/vm_service_wrapper.dart';
   import 'package:vm_service_lib/vm_service_lib.dart';
   import 'package:vm_service_lib/vm_service_lib_io.dart';
  +
  +import '../integration_tests/integration.dart';
   
   class AppFixture {
     AppFixture._(
  
positive.code:       serviceConnection,
        vm.isolates,
      );
    }
  
    String get scriptSource {
  
negative.code:   static Future<CliAppFixture> create(String appScriptPath) async {
      final Process process = await Process.start(
        Platform.resolvedExecutable,
        <String>['--observe=0', '--pause-isolates-on-start', appScriptPath],
      );
  
      final Stream<String> lines =
  