retriveAll method

Implementation

@override
Future<List<FeedEntryModel>> retriveAll() async {
  assert(_cacheStore != null);
  final feedEntries = <FeedEntryModel>[];
  final keys = await _cacheStore!.keys;
  for (final key in keys) {
    final value = await _cacheStore!.get(key);
    if (value != null) {
      feedEntries.add(value);
    }
  }
  return feedEntries;
}