import 'dart:collection';

bool get hasUnsoundNullSafety => const <Null>[] is List<Object>;

class MyMap<K, V> with MapMixin<K, V> {
  int containsKeyCount = 0;
  int indexGetCount = 0;
  final Map<K, V> _map;
  MyMap(this._map);
  bool containsKey(Object? key) {}
  V? operator [](Object? key) {}
  void operator []=(K key, V value) => _map[key] = value;
  void clear() => _map.clear();
  Iterable<K> get keys => _map.keys;
  V? remove(Object? key) => _map.remove(key);
}

int method(Map<int, String?> m) {}

test(Map<int, String> map,
    {required int expectedValue,
    required int expectedContainsKeyCount,
    required int expectedIndexGetCount}) {}

main() {}

expect(expected, actual, message) {}