040000 tree f667fdfee32afb8282379acefe61261d8816b8e9	lambda
040000 tree 92a00f2adb9b8f5f30cbfa0d2d9adb8e84a4d83f	nest
040000 tree 8ade90530e233d28c3c3ed01a15e48277a141232	pattern_matching_for_instanceof
040000 tree ca686b1dd94496e295f49ce9398a39e2c393c516	records
040000 tree 0a3b8cc59105832bd1c1caa9926806af05b180d9	sealed