this.ignoreCase = settings.getAsBoolean("ignore_case", false);
        this.removeTrailing = settings.getAsBoolean("remove_trailing", true);
        this.stopWords =
                Analysis.parseWords(env, settings, "stopwords", JapaneseAnalyzer.getDefaultStopSet(), NAMED_STOP_WORDS, ignoreCase);
    }

    @Override
    public TokenStream create(TokenStream tokenStream) {
        if (removeTrailing) {