byte[] groupId = Util.decodeGroupId(ns.getString("group"));
m.sendGroupMessageReaction(emoji, isRemove, targetAuthor, targetTimestamp, groupId);
} else {
byte[] groupId = Util.decodeGroupId(ns.getString("group"));
m.sendGroupMessageReaction(emoji, isRemove, targetAuthor, targetTimestamp, groupId);
} else {