tests/web/regress/issue/49599_test.dart

// Copyright (c) 2025, 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.

// dart2jsOptions=--disable-type-inference

import 'package:expect/expect.dart';

void main() {
  final foo = Foo();
  final bar = foo.mapLookup('a');
  Expect.equals('c', bar);
}

class Foo {
  late var lateMap = <String, String>{};

  String mapLookup(String key) {
    return lateMap.putIfAbsent(key, () => 'c');
  }
}