- name: lang
          in: query
          description: Language
          required: false
          schema:
            type: string
            example: en
        - name: preference
          in: query
          description: String to specify a shard for searching
          required: false
          schema:
            type: string
            example: abc
        - name: callback

  }

  /**
   * Returns a predicate that evaluates to {@code true} if the object reference being tested is
   * null.
   *
   * <p><b>Discouraged:</b> Prefer using either {@code x -> x == null} or {@code Objects::isNull},
   * but note that lambdas and method references do not have human-readable {@link #toString()}
   * representations and are not serializable.
   */

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

  /**
   * The HTTP <a href="https://w3c.github.io/webappsec-upgrade-insecure-requests/#preference">{@code
   * Upgrade-Insecure-Requests}</a> header field name.
   *
   * @since 28.1
   */
  public static final String UPGRADE_INSECURE_REQUESTS = "Upgrade-Insecure-Requests";

   * or {@code 'A'} and {@code 'Z'} inclusive.
   *
   * <p>This method is significantly faster than {@link String#equalsIgnoreCase} and should be used
   * in preference if at least one of the parameters is known to contain only ASCII characters.
   *
   * <p>Note however that this method does not always behave identically to expressions such as:
   *
   * <ul>

# Sorts for inner hits in collapse queries.
query.collapse.inner.hits.sorts=
# Default languages for queries.
query.default.languages=
# Default preference for JSON queries.
query.json.default.preference=_query
# Default preference for GSA queries.
query.gsa.default.preference=_query
# Language mapping for queries.
query.language.mapping=\
ar=ar\n\
bg=bg\n\
bn=bn\n\
ca=ca\n\
ckb-iq=ckb-iq\n\
ckb_IQ=ckb-iq\n\

    assertRoute(route, address, proxyA, dns.lookup(PROXY_A_HOST, 0), PROXY_A_PORT)
    routeDatabase.failed(route)
    routeSelector = newRouteSelector(address)

    // Confirm we enumerate both proxies, giving preference to the route from ProxyB.
    val selection2 = routeSelector.next()
    dns.assertRequests(PROXY_A_HOST, PROXY_B_HOST)
    assertRoute(selection2.next(), address, proxyB, dns.lookup(PROXY_B_HOST, 0), PROXY_B_PORT)

   * to HTTP/1.1.
   */
  public var protocolNegotiationEnabled: Boolean = true

  /**
   * The protocols supported by ALPN on incoming HTTPS connections in order of preference. The list
   * must contain [Protocol.HTTP_1_1]. It must not contain null.
   *
   * This list is ignored when [negotiation is disabled][protocolNegotiationEnabled].
   */

    public static final String REQUEST_LANGUAGES = "requestLanguages";

    /** Request page size parameter name. */
    public static final String REQUEST_PAGE_SIZE = "requestPageSize";

    /** Search preference for local node. */
    public static final String SEARCH_PREFERENCE_LOCAL = "_local";

    /** GSA API version identifier. */
    public static final String GSA_API_VERSION = "3.2";

     * Get the value for the key 'query.json.default.preference'. <br>
     * The value is, e.g. _query <br>
     * comment: Default preference for JSON queries.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getQueryJsonDefaultPreference();

    /**
     * Get the value for the key 'query.gsa.default.preference'. <br>
     * The value is, e.g. _query <br>

     * [rfc_7540]: https://tools.ietf.org/html/rfc7540
     * [rfc_7540_34]: https://tools.ietf.org/html/rfc7540#section-3.4
     *
     * @param protocols the protocols to use, in order of preference. If the list contains
     *     [Protocol.H2_PRIOR_KNOWLEDGE] then that must be the only protocol and HTTPS URLs will not
     *     be supported. Otherwise the list must contain [Protocol.HTTP_1_1]. The list must