"type": "mapping",
          "mappings_path": "${fess.dictionary.path}mapping.txt"
        },
        "traditional_chinese_convert": {
          "type": "fess_traditional_chinese_convert",
          "convert_type": "t2s"
        },
        "zero_width_spaces": {
            "type":       "mapping",
            "mappings": [ "\\u200C=> "]
        },
        "removeall_filter": {
          "type": "pattern_replace",

  fun encodedValue(index: Int): String = encodedValues[index]

  fun value(index: Int): String = encodedValue(index).percentDecode(plusIsSpace = true)

  override fun contentType(): MediaType = CONTENT_TYPE

  override fun contentLength(): Long = writeOrCountBytes(null, true)

  @Throws(IOException::class)
  override fun writeTo(sink: BufferedSink) {
    writeOrCountBytes(sink, false)
  }

  /**

      TypeToken<?> convertFromType = type.resolveType(Converter.class.getTypeParameters()[0]);
      TypeToken<?> convertToType = type.resolveType(Converter.class.getTypeParameters()[1]);
      @SuppressWarnings("unchecked") // returns default for both F and T
      T defaultConverter = (T) defaultConverter(convertFromType, convertToType);
      return defaultConverter;
    }
    if (type.getRawType().isInterface()) {

        final Map<String, String> params = new HashMap<>(crawlingConfig.getConfigParameterMap(ConfigName.CONFIG));
        params.put(ExtractData.RESOURCE_NAME_KEY, getResourceName(responseData));
        params.put(ExtractData.CONTENT_TYPE, responseData.getMimeType());
        params.put(ExtractData.CONTENT_ENCODING, responseData.getCharSet());
        params.put(ExtractData.URL, responseData.getUrl());

# Meta prefix for GSA queries.
query.gsa.meta.prefix=MT_
# Charset field for GSA index queries.
query.gsa.index.field.charset=charset
# Content type field for GSA index queries.
query.gsa.index.field.content_type.=content_type
# Maximum concurrent group results for collapse queries.
query.collapse.max.concurrent.group.results=4
# Inner hits name for collapse queries.
query.collapse.inner.hits.name=similar_docs

  /** The HTTP {@code Content-Length} header field name. */
  public static final String CONTENT_LENGTH = "Content-Length";

  /** The HTTP {@code Content-Type} header field name. */
  public static final String CONTENT_TYPE = "Content-Type";

  /** The HTTP {@code Date} header field name. */
  public static final String DATE = "Date";

  /** The HTTP {@code Pragma} header field name. */
  public static final String PRAGMA = "Pragma";

    /** The key of the configuration. e.g. charset */
    String QUERY_GSA_INDEX_FIELD_CHARSET = "query.gsa.index.field.charset";

    /** The key of the configuration. e.g. content_type */
    String QUERY_GSA_INDEX_FIELD_content_type_ = "query.gsa.index.field.content_type.";

    /** The key of the configuration. e.g. 4 */
    String QUERY_COLLAPSE_MAX_CONCURRENT_GROUP_RESULTS = "query.collapse.max.concurrent.group.results";