if (textObj == null) {
                continue;
            }
            final String text = textObj.toString();
            final String lang = document.get(langFieldName) == null ? null : document.get(langFieldName).toString();

            final List<AnalyzeToken> tokens = analyzeText(analyzer, field, text, lang);
            if (tokens == null) {
                continue;
            }

            ReadingConverter readingConverter, Normalizer normalizer);

    List<SuggestItem> parseDocument(Map<String, Object> document, String[] fields, String[] tagFieldNames, String roleFieldName,
            String langFieldName, ReadingConverter readingConverter, ReadingConverter contentsReadingConverter, Normalizer normalizer,
            SuggestAnalyzer analyzer);

    protected String index;
    protected SuggestSettings settings;

    protected String[] supportedFields;
    protected String[] tagFieldNames;
    protected String roleFieldName;
    protected String langFieldName;
    protected String[] badWords;
    protected boolean parallel;

    protected ReadingConverter readingConverter;
    protected ReadingConverter contentsReadingConverter;
    protected Normalizer normalizer;

        public static final String TAG_FIELD_NAME = "tagFieldName";
        public static final String ROLE_FIELD_NAME = "roleFieldName";
        public static final String LANG_FIELD_NAME = "langFieldName";
        public static final String PARALLEL_PROCESSING = "parallel";
        public static final String MAX_CONTENT_LENGTH = "maxContextLength";

        private DefaultKeys() {
        }
    }