Remove compilation trace and dynamic support code (#34529)

packages/flutter_tools/lib/src/android/android_device.dart

@@ -391,8 +391,7 @@ class AndroidDevice extends Device {
     final TargetPlatform devicePlatform = await targetPlatform;
     if (!(devicePlatform == TargetPlatform.android_arm ||
           devicePlatform == TargetPlatform.android_arm64) &&
-        !(debuggingOptions.buildInfo.isDebug ||
-          debuggingOptions.buildInfo.isDynamic)) {
+        !debuggingOptions.buildInfo.isDebug) {
       printError('Profile and release builds are only supported on ARM targets.');
       return LaunchResult.failed();
     }

packages/flutter_tools/lib/src/android/gradle.dart

@@ -445,8 +445,6 @@ Future<void> _buildGradleProjectV2(
   }
   assert(buildInfo.trackWidgetCreation != null);
   command.add('-Ptrack-widget-creation=${buildInfo.trackWidgetCreation}');
-  if (buildInfo.compilationTraceFilePath != null)
-    command.add('-Pcompilation-trace-file=${buildInfo.compilationTraceFilePath}');
   if (buildInfo.extraFrontEndOptions != null)
     command.add('-Pextra-front-end-options=${buildInfo.extraFrontEndOptions}');
   if (buildInfo.extraGenSnapshotOptions != null)

packages/flutter_tools/lib/src/artifacts.dart

@@ -49,19 +49,8 @@ String _artifactToFileName(Artifact artifact, [ TargetPlatform platform, BuildMo
     case Artifact.flutterMacOSFramework:
       return 'FlutterMacOS.framework';
     case Artifact.vmSnapshotData:
-      // Flutter 'debug' and 'dynamic profile' modes for all target platforms use Dart
-      // RELEASE VM snapshot that comes from host debug build and has the metadata
-      // related to development tools. Flutter 'dynamic release' mode uses Dart PRODUCT
-      // VM snapshot from host dynamic release build that strips out the metadata
-      // related to development tools.
-      if (mode == BuildMode.dynamicRelease) {
-        return 'product_vm_isolate_snapshot.bin';
-      }
       return 'vm_isolate_snapshot.bin';
     case Artifact.isolateSnapshotData:
-      if (mode == BuildMode.dynamicRelease) {
-        return 'product_isolate_snapshot.bin';
-      }
       return 'isolate_snapshot.bin';
     case Artifact.platformKernelDill:
       return 'platform_strong.dill';

packages/flutter_tools/lib/src/asset.dart

@@ -286,7 +286,7 @@ class _Asset {
   @override
   int get hashCode {
     return baseDir.hashCode
-        ^relativeUri.hashCode
+        ^ relativeUri.hashCode
         ^ entryUri.hashCode;
   }
 }

packages/flutter_tools/lib/src/build_info.dart

@@ -14,7 +14,6 @@ class BuildInfo {
     this.mode,
     this.flavor, {
     this.trackWidgetCreation = false,
-    this.compilationTraceFilePath,
     this.extraFrontEndOptions,
     this.extraGenSnapshotOptions,
     this.fileSystemRoots,
@@ -39,9 +38,6 @@ class BuildInfo {
   /// Whether the build should track widget creation locations.
   final bool trackWidgetCreation;
 
-  /// Dart compilation trace file to use for JIT VM snapshot.
-  final String compilationTraceFilePath;
-
   /// Extra command-line options for front-end.
   final String extraFrontEndOptions;
 
@@ -64,8 +60,6 @@ class BuildInfo {
   static const BuildInfo debug = BuildInfo(BuildMode.debug, null);
   static const BuildInfo profile = BuildInfo(BuildMode.profile, null);
   static const BuildInfo release = BuildInfo(BuildMode.release, null);
-  static const BuildInfo dynamicProfile = BuildInfo(BuildMode.dynamicProfile, null);
-  static const BuildInfo dynamicRelease = BuildInfo(BuildMode.dynamicRelease, null);
 
   /// Returns whether a debug build is requested.
   ///
@@ -75,15 +69,12 @@ class BuildInfo {
   /// Returns whether a profile build is requested.
   ///
   /// Exactly one of [isDebug], [isProfile], or [isRelease] is true.
-  bool get isProfile => mode == BuildMode.profile || mode == BuildMode.dynamicProfile;
+  bool get isProfile => mode == BuildMode.profile;
 
   /// Returns whether a release build is requested.
   ///
   /// Exactly one of [isDebug], [isProfile], or [isRelease] is true.
-  bool get isRelease => mode == BuildMode.release || mode == BuildMode.dynamicRelease;
-
-  /// Returns whether a dynamic build is requested.
-  bool get isDynamic => mode == BuildMode.dynamicProfile || mode == BuildMode.dynamicRelease;
+  bool get isRelease => mode == BuildMode.release;
 
   bool get usesAot => isAotBuildMode(mode);
   bool get supportsEmulator => isEmulatorBuildMode(mode);
@@ -122,8 +113,6 @@ enum BuildMode {
   debug,
   profile,
   release,
-  dynamicProfile,
-  dynamicRelease
 }
 
 String validatedBuildNumberForPlatform(TargetPlatform targetPlatform, String buildNumber) {
@@ -216,9 +205,7 @@ bool isAotBuildMode(BuildMode mode) {
 
 // Returns true if the given build mode can be used on emulators / simulators.
 bool isEmulatorBuildMode(BuildMode mode) {
-  return mode == BuildMode.debug ||
-    mode == BuildMode.dynamicRelease ||
-    mode == BuildMode.dynamicProfile;
+  return mode == BuildMode.debug;
 }
 
 enum HostPlatform {
@@ -468,9 +455,3 @@ String getWindowsBuildDirectory() {
 String getFuchsiaBuildDirectory() {
   return fs.path.join(getBuildDirectory(), 'fuchsia');
 }
-
-/// Returns directory used by incremental compiler (IKG - incremental kernel
-/// generator) to store cached intermediate state.
-String getIncrementalCompilerByteStoreDirectory() {
-  return fs.path.join(getBuildDirectory(), 'ikg_byte_store');
-}

packages/flutter_tools/lib/src/bundle.dart

@@ -9,7 +9,6 @@ import 'package:pool/pool.dart';
 
 import 'artifacts.dart';
 import 'asset.dart';
-import 'base/build.dart';
 import 'base/common.dart';
 import 'base/file_system.dart';
 import 'build_info.dart';
@@ -46,7 +45,6 @@ const String defaultPrivateKeyPath = 'privatekey.der';
 const String _kKernelKey = 'kernel_blob.bin';
 const String _kVMSnapshotData = 'vm_snapshot_data';
 const String _kIsolateSnapshotData = 'isolate_snapshot_data';
-const String _kIsolateSnapshotInstr = 'isolate_snapshot_instr';
 
 /// Provides a `build` method that builds the bundle.
 class BundleBuilder {
@@ -67,7 +65,6 @@ class BundleBuilder {
     bool precompiledSnapshot = false,
     bool reportLicensedPackages = false,
     bool trackWidgetCreation = false,
-    String compilationTraceFilePath,
     List<String> extraFrontEndOptions = const <String>[],
     List<String> extraGenSnapshotOptions = const <String>[],
     List<String> fileSystemRoots,
@@ -79,27 +76,6 @@ class BundleBuilder {
     applicationKernelFilePath ??= getDefaultApplicationKernelPath(trackWidgetCreation: trackWidgetCreation);
     final FlutterProject flutterProject = FlutterProject.current();
 
-    if (compilationTraceFilePath != null) {
-      if (buildMode != BuildMode.dynamicProfile && buildMode != BuildMode.dynamicRelease) {
-        // Silently ignore JIT snapshotting for those builds that don't support it.
-        compilationTraceFilePath = null;
-
-      } else if (compilationTraceFilePath.isEmpty) {
-        // Disable JIT snapshotting if flag is empty.
-        printStatus('Code snapshot will be disabled for this build.');
-        compilationTraceFilePath = null;
-
-      } else if (!fs.file(compilationTraceFilePath).existsSync()) {
-        // Be forgiving if compilation trace file is missing.
-        printStatus('No compilation trace available. To optimize performance, consider using --train.');
-        final File tmp = fs.systemTempDirectory.childFile('flutterEmptyCompilationTrace.txt');
-        compilationTraceFilePath = (tmp..createSync(recursive: true)).path;
-
-      } else {
-        printStatus('Code snapshot will use compilation training file $compilationTraceFilePath.');
-      }
-    }
-
     DevFSContent kernelContent;
     if (!precompiledSnapshot) {
       if ((extraFrontEndOptions != null) && extraFrontEndOptions.isNotEmpty)
@@ -108,8 +84,6 @@ class BundleBuilder {
       final KernelCompiler kernelCompiler = await kernelCompilerFactory.create(flutterProject);
       final CompilerOutput compilerOutput = await kernelCompiler.compile(
         sdkRoot: artifacts.getArtifactPath(Artifact.flutterPatchedSdkPath, mode: buildMode),
-        incrementalCompilerByteStorePath: compilationTraceFilePath != null ? null :
-            fs.path.absolute(getIncrementalCompilerByteStoreDirectory()),
         mainPath: fs.file(mainPath).absolute.path,
         outputFilePath: applicationKernelFilePath,
         depFilePath: depfilePath,
@@ -118,7 +92,6 @@ class BundleBuilder {
         fileSystemRoots: fileSystemRoots,
         fileSystemScheme: fileSystemScheme,
         packagesPath: packagesPath,
-        linkPlatformKernelIn: compilationTraceFilePath != null,
       );
       if (compilerOutput?.outputFilename == null) {
         throwToolExit('Compiler failed on $mainPath');
@@ -127,22 +100,6 @@ class BundleBuilder {
 
       await fs.directory(getBuildDirectory()).childFile('frontend_server.d')
           .writeAsString('frontend_server.d: ${artifacts.getArtifactPath(Artifact.frontendServerSnapshotForEngineDartSdk)}\n');
-
-      if (compilationTraceFilePath != null) {
-        final JITSnapshotter snapshotter = JITSnapshotter();
-        final int snapshotExitCode = await snapshotter.build(
-          platform: platform,
-          buildMode: buildMode,
-          mainPath: applicationKernelFilePath,
-          outputPath: getBuildDirectory(),
-          packagesPath: packagesPath,
-          compilationTraceFilePath: compilationTraceFilePath,
-          extraGenSnapshotOptions: extraGenSnapshotOptions,
-        );
-        if (snapshotExitCode != 0) {
-          throwToolExit('Snapshotting exited with non-zero exit code: $snapshotExitCode');
-        }
-      }
     }
 
     final AssetBundle assets = await buildAssets(
@@ -160,7 +117,6 @@ class BundleBuilder {
       kernelContent: kernelContent,
       privateKeyPath: privateKeyPath,
       assetDirPath: assetDirPath,
-      compilationTraceFilePath: compilationTraceFilePath,
     );
   }
 }
@@ -196,27 +152,17 @@ Future<void> assemble({
   DevFSContent kernelContent,
   String privateKeyPath = defaultPrivateKeyPath,
   String assetDirPath,
-  String compilationTraceFilePath,
 }) async {
   assetDirPath ??= getAssetBuildDirectory();
   printTrace('Building bundle');
 
   final Map<String, DevFSContent> assetEntries = Map<String, DevFSContent>.from(assetBundle.entries);
   if (kernelContent != null) {
-    if (compilationTraceFilePath != null) {
-      final String vmSnapshotData = artifacts.getArtifactPath(Artifact.vmSnapshotData, mode: buildMode);
-      final String isolateSnapshotData = fs.path.join(getBuildDirectory(), _kIsolateSnapshotData);
-      final String isolateSnapshotInstr = fs.path.join(getBuildDirectory(), _kIsolateSnapshotInstr);
-      assetEntries[_kVMSnapshotData] = DevFSFileContent(fs.file(vmSnapshotData));
-      assetEntries[_kIsolateSnapshotData] = DevFSFileContent(fs.file(isolateSnapshotData));
-      assetEntries[_kIsolateSnapshotInstr] = DevFSFileContent(fs.file(isolateSnapshotInstr));
-    } else {
-      final String vmSnapshotData = artifacts.getArtifactPath(Artifact.vmSnapshotData, mode: buildMode);
-      final String isolateSnapshotData = artifacts.getArtifactPath(Artifact.isolateSnapshotData, mode: buildMode);
-      assetEntries[_kKernelKey] = kernelContent;
-      assetEntries[_kVMSnapshotData] = DevFSFileContent(fs.file(vmSnapshotData));
-      assetEntries[_kIsolateSnapshotData] = DevFSFileContent(fs.file(isolateSnapshotData));
-    }
+    final String vmSnapshotData = artifacts.getArtifactPath(Artifact.vmSnapshotData, mode: buildMode);
+    final String isolateSnapshotData = artifacts.getArtifactPath(Artifact.isolateSnapshotData, mode: buildMode);
+    assetEntries[_kKernelKey] = kernelContent;
+    assetEntries[_kVMSnapshotData] = DevFSFileContent(fs.file(vmSnapshotData));
+    assetEntries[_kIsolateSnapshotData] = DevFSFileContent(fs.file(isolateSnapshotData));
   }
 
   printTrace('Writing asset files to $assetDirPath');

packages/flutter_tools/lib/src/commands/build_bundle.dart

@@ -125,7 +125,6 @@ class BuildBundleCommand extends BuildSubCommand {
       precompiledSnapshot: argResults['precompiled'],
       reportLicensedPackages: argResults['report-licensed-packages'],
       trackWidgetCreation: argResults['track-widget-creation'],
-      compilationTraceFilePath: argResults['compilation-trace-file'],
       extraFrontEndOptions: argResults[FlutterOptions.kExtraFrontEndOptions],
       extraGenSnapshotOptions: argResults[FlutterOptions.kExtraGenSnapshotOptions],
       fileSystemScheme: argResults['filesystem-scheme'],

packages/flutter_tools/lib/src/commands/run.dart

@@ -43,18 +43,6 @@ abstract class RunCommandBase extends FlutterCommand with DeviceBasedDevelopment
       )
       ..addOption('route',
         help: 'Which route to load when running the app.',
-      )
-      ..addFlag('train',
-        hide: !verboseHelp,
-        negatable: false,
-        help: 'Save Dart runtime compilation trace to a file. '
-              'Compilation trace will be saved to a file specified by --compilation-trace-file '
-              'when \'flutter run --dynamic --profile --train\' exits. '
-              'This file contains a list of Dart symbols that were compiled by the runtime JIT '
-              'compiler up to that point. This file can be used in subsequent --dynamic builds '
-              'to precompile some code by the offline compiler. '
-              'This flag is only allowed when running as --dynamic --profile (recommended) or '
-              '--debug (may include unwanted debug symbols).',
       );
     usesTargetOption();
     usesPortOptions();
@@ -400,11 +388,6 @@ class RunCommand extends RunCommandBase {
       }
     }
 
-    if (argResults['train'] &&
-        getBuildMode() != BuildMode.debug && getBuildMode() != BuildMode.dynamicProfile)
-      throwToolExit('Error: --train is only allowed when running as --dynamic --profile '
-          '(recommended) or --debug (may include unwanted debug symbols).');
-
     List<String> expFlags;
     if (argParser.options.containsKey(FlutterOptions.kEnableExperiment) &&
         argResults[FlutterOptions.kEnableExperiment].isNotEmpty) {
@@ -447,7 +430,6 @@ class RunCommand extends RunCommandBase {
         projectRootPath: argResults['project-root'],
         packagesFilePath: globalResults['packages'],
         dillOutputPath: argResults['output-dill'],
-        saveCompilationTrace: argResults['train'],
         stayResident: stayResident,
         ipv6: ipv6,
       );
@@ -469,7 +451,6 @@ class RunCommand extends RunCommandBase {
         applicationBinary: applicationBinaryPath == null
             ? null
             : fs.file(applicationBinaryPath),
-        saveCompilationTrace: argResults['train'],
         stayResident: stayResident,
         ipv6: ipv6,
       );

packages/flutter_tools/lib/src/resident_runner.dart

@@ -54,15 +54,15 @@ class FlutterDevice {
     Device device, {
     @required FlutterProject flutterProject,
     @required bool trackWidgetCreation,
+    @required String target,
+    @required BuildMode buildMode,
     String dillOutputPath,
     List<String> fileSystemRoots,
     String fileSystemScheme,
     String viewFilter,
-    @required String target,
     TargetModel targetModel = TargetModel.flutter,
     List<String> experimentalFlags,
     ResidentCompiler generator,
-    @required BuildMode buildMode,
   }) async {
     ResidentCompiler generator;
     if (flutterProject.hasBuilders) {
@@ -512,7 +512,6 @@ abstract class ResidentRunner {
     this.usesTerminalUI = true,
     String projectRootPath,
     String packagesFilePath,
-    this.saveCompilationTrace,
     this.stayResident,
     this.ipv6,
   }) {
@@ -527,7 +526,6 @@ abstract class ResidentRunner {
   final String target;
   final DebuggingOptions debuggingOptions;
   final bool usesTerminalUI;
-  final bool saveCompilationTrace;
   final bool stayResident;
   final bool ipv6;
   final Completer<int> _finished = Completer<int>();
@@ -585,8 +583,6 @@ abstract class ResidentRunner {
 
   Future<void> exit() async {
     _exited = true;
-    if (saveCompilationTrace)
-      await _debugSaveCompilationTrace();
     await stopEchoingDeviceLog();
     await preExit();
     await exitApp();
@@ -704,35 +700,6 @@ abstract class ResidentRunner {
     }
   }
 
-  Future<void> _debugSaveCompilationTrace() async {
-    if (!supportsServiceProtocol)
-      return;
-
-    for (FlutterDevice device in flutterDevices) {
-      for (FlutterView view in device.views) {
-        final int index = device.views.indexOf(view);
-        final File outputFile = fs.currentDirectory
-            .childFile('compilation${index == 0 ? '' : index}.txt');
-
-        printStatus('Saving compilation training data '
-            'for ${device.device.name}${index == 0 ? '' :'/Isolate$index'} '
-            'to ${fs.path.relative(outputFile.path)}...');
-
-        List<int> buffer;
-        try {
-          buffer = await view.uiIsolate.flutterDebugSaveCompilationTrace();
-          assert(buffer != null);
-        } catch (error) {
-          printError('Error communicating with Flutter on the device: $error');
-          continue;
-        }
-
-        outputFile.parent.createSync(recursive: true);
-        outputFile.writeAsBytesSync(buffer);
-      }
-    }
-  }
-
   Future<void> _debugTogglePlatform() async {
     await refreshViews();
     final String from = await flutterDevices[0].views[0].uiIsolate.flutterPlatformOverride();

packages/flutter_tools/lib/src/resident_web_runner.dart

@@ -39,7 +39,6 @@ class ResidentWebRunner extends ResidentRunner {
           target: target,
           usesTerminalUI: true,
           stayResident: true,
-          saveCompilationTrace: false,
           debuggingOptions: debuggingOptions,
           ipv6: ipv6,
         );

packages/flutter_tools/lib/src/run_cold.dart

@@ -23,14 +23,12 @@ class ColdRunner extends ResidentRunner {
     this.traceStartup = false,
     this.awaitFirstFrameWhenTracing = true,
     this.applicationBinary,
-    bool saveCompilationTrace = false,
     bool stayResident = true,
     bool ipv6 = false,
   }) : super(devices,
              target: target,
              debuggingOptions: debuggingOptions,
              usesTerminalUI: usesTerminalUI,
-             saveCompilationTrace: saveCompilationTrace,
              stayResident: stayResident,
              ipv6: ipv6);
 
@@ -193,9 +191,6 @@ class ColdRunner extends ResidentRunner {
       ? 'To detach, press "d"; to quit, press "q".'
       : 'To quit, press "q".';
     if (haveDetails && !details) {
-      if (saveCompilationTrace) {
-        printStatus('Compilation training data will be saved when flutter run quits...');
-      }
       printStatus('For a more detailed help message, press "h". $quitMessage');
     } else if (haveAnything) {
       printStatus('To repeat this help message, press "h". $quitMessage');

packages/flutter_tools/lib/src/run_hot.dart

@@ -64,7 +64,6 @@ class HotRunner extends ResidentRunner {
     String projectRootPath,
     String packagesFilePath,
     this.dillOutputPath,
-    bool saveCompilationTrace = false,
     bool stayResident = true,
     bool ipv6 = false,
   }) : super(devices,
@@ -73,7 +72,6 @@ class HotRunner extends ResidentRunner {
              usesTerminalUI: usesTerminalUI,
              projectRootPath: projectRootPath,
              packagesFilePath: packagesFilePath,
-             saveCompilationTrace: saveCompilationTrace,
              stayResident: stayResident,
              ipv6: ipv6);
 

packages/flutter_tools/lib/src/runner/flutter_command.dart

@@ -286,27 +286,15 @@ abstract class FlutterCommand extends Command<void> {
     final List<bool> modeFlags = <bool>[argResults['debug'], argResults['profile'], argResults['release']];
     if (modeFlags.where((bool flag) => flag).length > 1)
       throw UsageException('Only one of --debug, --profile, or --release can be specified.', null);
-    final bool dynamicFlag = argParser.options.containsKey('dynamic')
-        ? argResults['dynamic']
-        : false;
-
     if (argResults['debug']) {
-      if (dynamicFlag)
-        throw ToolExit('Error: --dynamic requires --release or --profile.');
       return BuildMode.debug;
     }
-    if (argResults['profile'])
-      return dynamicFlag ? BuildMode.dynamicProfile : BuildMode.profile;
-    if (argResults['release'])
-      return dynamicFlag ? BuildMode.dynamicRelease : BuildMode.release;
-
-    if (_defaultBuildMode == BuildMode.debug && dynamicFlag)
-      throw ToolExit('Error: --dynamic requires --release or --profile.');
-    if (_defaultBuildMode == BuildMode.release && dynamicFlag)
-      return BuildMode.dynamicRelease;
-    if (_defaultBuildMode == BuildMode.profile && dynamicFlag)
-      return BuildMode.dynamicProfile;
-
+    if (argResults['profile']) {
+      return BuildMode.profile;
+    }
+    if (argResults['release']) {
+      return BuildMode.release;
+    }
     return _defaultBuildMode;
   }
 
@@ -349,9 +337,6 @@ abstract class FlutterCommand extends Command<void> {
         ? argResults['flavor']
         : null,
       trackWidgetCreation: trackWidgetCreation,
-      compilationTraceFilePath: argParser.options.containsKey('compilation-trace-file')
-          ? argResults['compilation-trace-file']
-          : null,
       extraFrontEndOptions: extraFrontEndOptions,
       extraGenSnapshotOptions: argParser.options.containsKey(FlutterOptions.kExtraGenSnapshotOptions)
           ? argResults[FlutterOptions.kExtraGenSnapshotOptions]

packages/flutter_tools/test/artifacts_test.dart

@@ -35,14 +35,6 @@ void main() {
           artifacts.getArtifactPath(Artifact.flutterTester),
           fs.path.join(tempDir.path, 'bin', 'cache', 'artifacts', 'engine', 'linux-x64', 'flutter_tester'),
       );
-      expect(
-          artifacts.getArtifactPath(Artifact.genSnapshot, platform: TargetPlatform.android_arm64, mode: BuildMode.dynamicRelease),
-          fs.path.join(tempDir.path, 'bin', 'cache', 'artifacts', 'engine', 'android-arm64-dynamic-release', 'linux-x64', 'gen_snapshot'),
-      );
-      expect(
-          artifacts.getArtifactPath(Artifact.vmSnapshotData, platform: TargetPlatform.darwin_x64, mode: BuildMode.dynamicRelease),
-          fs.path.join(tempDir.path, 'bin', 'cache', 'artifacts', 'engine', 'darwin-x64', 'product_vm_isolate_snapshot.bin'),
-      );
     }, overrides: <Type, Generator>{
       Cache: () => Cache(rootOverride: tempDir),
       Platform: () => FakePlatform(operatingSystem: 'linux'),
@@ -53,10 +45,6 @@ void main() {
           artifacts.getEngineType(TargetPlatform.android_arm, BuildMode.debug),
           'android-arm',
       );
-      expect(
-          artifacts.getEngineType(TargetPlatform.android_arm64, BuildMode.dynamicProfile),
-          'android-arm64-dynamic-profile',
-      );
       expect(
           artifacts.getEngineType(TargetPlatform.ios, BuildMode.release),
           'ios-release',

packages/flutter_tools/test/commands/build_bundle_test.dart

@@ -38,7 +38,6 @@ void main() {
           precompiledSnapshot: anyNamed('precompiledSnapshot'),
           reportLicensedPackages: anyNamed('reportLicensedPackages'),
           trackWidgetCreation: anyNamed('trackWidgetCreation'),
-          compilationTraceFilePath: anyNamed('compilationTraceFilePath'),
           extraFrontEndOptions: anyNamed('extraFrontEndOptions'),
           extraGenSnapshotOptions: anyNamed('extraGenSnapshotOptions'),
           fileSystemRoots: anyNamed('fileSystemRoots'),