code: public static List<KoreanPhraseExtractor.KoreanPhrase> extractPhrases(Seq<KoreanToken> tokens, boolean filterSpam, boolean includeHashtags) {
      return JavaConversions.seqAsJavaList(
          TwitterKoreanProcessor.extractPhrases(tokens, filterSpam, includeHashtags)
      );
    }
docs: Extract phrases from Korean input text
  
  @param tokens Korean tokens (output of tokenize(CharSequence text)).
  @return List of phrase CharSequences.