public List<Key> put(SyndFeed feed) {
if (feed == null) {
throw new NullPointerException("feed is null.");
}
NicoliveMeta n = NicoliveMeta.get();
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
df.setTimeZone(TimeZone.getTimeZone("Asia/Tokyo"));
List<Nicolive> nicolives = new LinkedList<Nicolive>();
@SuppressWarnings("unchecked")
List<SyndEntry> entries = (List<SyndEntry>) feed.getEntries();