refreshFeed method
Refresh the feed and add it to the stream
Implementation
Future<void> refreshFeed({
required String tag,
required FeedSortOrder sort,
}) async {
final key = _getKey(tag, sort.name);
if (!_feedStreamControllers.containsKey(key)) {
throw NotFoundFailure('Feed $key not found');
}
unawaited(_fetchAndAddFeed(tag: tag, sort: sort, requestLatest: true));
}