diff --git a/LanguageFeatures/FinalizationRegistry/gc_utils_lib.dart b/LanguageFeatures/FinalizationRegistry/gc_utils_lib.dart
new file mode 100644
index 0000000..d4f34e9
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+++ b/LanguageFeatures/FinalizationRegistry/gc_utils_lib.dart
@@ -0,0 +1,34 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @description Check that WeakReference constructor rejects any object that is
+/// not supported as an Expando key. Test Strings.
+/// @author sgrekhov@unipro.ru
+library gc_utils_lib;
+
+import "dart:io";
+import "dart:ffi";
+
+void triggerGc() {
+  String _platformPath(String name, {String? path}) {
+    if (path == null) path = "";
+    if (Platform.isLinux || Platform.isAndroid || Platform.isFuchsia)
+      return path + "lib" + name + ".so";
+    if (Platform.isMacOS) return path + "lib" + name + ".dylib";
+    if (Platform.isWindows) return path + name + ".dll";
+    throw Exception("Platform not implemented");
+  }
+
+  DynamicLibrary dlOpenPlatformSpecific(String name, {String? path}) {
+    String fullPath = _platformPath(name, path: path);
+    return DynamicLibrary.open(fullPath);
+  }
+
+  final ffiTestFunctions = dlOpenPlatformSpecific("ffi_test_functions");
+
+  void Function() _triggerGC = ffiTestFunctions
+      .lookupFunction<Void Function(), void Function()>("TriggerGC");
+  _triggerGC();
+}
+