public static void clean(Tweet tw) {
   String tweet = removeUrl(tw.getTweet());
   List<String> newToks = Twokenize.tokenizeRawTweetText(tweet);
   replaceSlangs(newToks);
   // newToks = removeStopWords(newToks);
   tweet = String.join(" ", newToks);
   tw.setTweet(tweet);
 }