final Map<String, Object> params = new HashMap<>();
            params.put("query", query);
            params.put("responseFields", responseFields);
            params.put("offset", offset);
            params.put("size", size);
            // TODO support rescorer(convert to map)
            // params.put("geoInfo", geoInfo);
            // params.put("facetInfo", facetInfo);

     * <pre>
     * message: The size of {item} must be between {min} and {max}.
     * </pre>
     * @param property The property name for the message. (NotNull)
     * @param min The parameter min for message. (NotNull)
     * @param max The parameter max for message. (NotNull)
     * @return this. (NotNull)
     */

     *
     * @param <T> the response type
     * @param th the tree handle
     * @param createDisposition the create disposition
     * @param createOptions the create options
     * @param fileAttributes the file attributes
     * @param desiredAccess the desired access flags
     * @param shareAccess the share access flags
     * @param first the first request to execute

     * {@code FILE_SHARE_DELETE} logically OR'd together.
     *
     * @param   context A URL string
     * @param   name A path string relative to the <code>context</code> paremeter
     * @param   auth The credentials the client should use for authentication
     * @param   shareAccess Specifies what access other clients have while this file is open.
     * @throws  MalformedURLException

   * must be well-behaved with respect to {@link Object#equals} and {@link Object#hashCode}.
   *
   * @param left the map to treat as the "left" map for purposes of comparison
   * @param right the map to treat as the "right" map for purposes of comparison
   * @param valueEquivalence the equivalence relationship to use to compare values
   * @return the difference between the two maps
   * @since 10.0
   */

   * must be well-behaved with respect to {@link Object#equals} and {@link Object#hashCode}.
   *
   * @param left the map to treat as the "left" map for purposes of comparison
   * @param right the map to treat as the "right" map for purposes of comparison
   * @param valueEquivalence the equivalence relationship to use to compare values
   * @return the difference between the two maps
   * @since 10.0
   */

     *
     * @param target The target object whose existing contents should be merged with the source, must not be
     *            <code>null</code>.
     * @param source The (read-only) source object that should be merged into the target object, may be
     *            <code>null</code>.

              | (usesWriteQueue ? WRITE_MASK : 0);
      return factories[flags];
    }

    /**
     * Creates a new entry.
     *
     * @param segment to create the entry for
     * @param key of the entry
     * @param hash of the key
     * @param next entry in the same bucket
     */
    abstract <K, V> ReferenceEntry<K, V> newEntry(

     */
    public String getKey() {
        return constructKey(getGroupId(), getArtifactId());
    }

    /**
     * @param groupId the group ID of the plugin in the repository
     * @param artifactId the artifact ID of the reporting plugin in the repository
     * @return the key of the plugin, ie {@code groupId:artifactId}
     */

// a dry-run that helps skip the nodes that may have hung drives. By default
// restart/stop will ignore the servers that are hung on drives. You can use
// 'force' param to force restart even with hung drives if needed.
func (a adminAPIHandlers) ServiceV2Handler(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()

	vars := mux.Vars(r)
	action := vars["action"]