containsKeys method

@override Future<Map<String, bool>> containsKeys(List<String> keys)

Checks if the cache contains values associated with all the given keys.

Returns a map where the keys are the original keys and the values are booleans indicating whether the key exists in the cache.

Throws a CacheException if there is an error checking the keys.

Implementation

@override
Future<Map<String, bool>> containsKeys(List<String> keys) async {
  final p = await prefs;
  final result = <String, bool>{};

  for (final key in keys) {
    result[key] = p.containsKey(_getKey(key));
  }

  return result;
}