*
     * @param body the general settings data to update
     * @return JSON response with update status
     */
    @Execute
    public JsonResponse<ApiResult> put$index(final EditBody body) {
        validateApi(body, messages -> {});
        final EditBody newBody = new EditBody();
        AdminGeneralAction.updateForm(fessConfig, newBody);

        final SearchEngineClient client = new SearchEngineClient() {
            @Override
            public boolean update(final String index, final String id, final String field, final Object value) {
                resultMap.put("index", index);
                resultMap.put("id", id);
                resultMap.put("field", field);
                resultMap.put("value", value.toString());
                return true;
            }
        };

        Collection<Integer> indexes, int scale, double[] dataset) {
      Arrays.sort(dataset);
      ImmutableMap.Builder<Integer, Double> builder = ImmutableMap.builder();
      for (int index : indexes) {
        builder.put(index, singleQuantileFromSorted(index, scale, dataset));
      }
      return builder.buildOrThrow();
    }

    private double singleQuantileFromSorted(int index, int scale, double[] dataset) {

        Collection<Integer> indexes, int scale, double[] dataset) {
      Arrays.sort(dataset);
      ImmutableMap.Builder<Integer, Double> builder = ImmutableMap.builder();
      for (int index : indexes) {
        builder.put(index, singleQuantileFromSorted(index, scale, dataset));
      }
      return builder.buildOrThrow();
    }

    private double singleQuantileFromSorted(int index, int scale, double[] dataset) {

        Metadata.Builder mb = Metadata.builder();
        for (int i = 1; i <= numIndices; i++) {
            mb.put(
                IndexMetadata.builder("test_" + i)
                    .settings(Settings.builder().put("index.version.created", Version.CURRENT))
                    .numberOfShards(numShards)
                    .numberOfReplicas(numReplicas)
            );
        }
        Metadata metadata = mb.build();

    ImmutableMap.Builder<Integer, Double> expectedBuilder = ImmutableMap.builder();
    for (int index = 0; index <= 100; index++) {
      indexes.add(index);
      expectedBuilder.put(index, expectedLargeDatasetPercentile(index));
    }
    Random random = new Random(770683168895677741L);
    Collections.shuffle(indexes, random);

    ImmutableMap.Builder<Integer, Double> expectedBuilder = ImmutableMap.builder();
    for (int index = 0; index <= 100; index++) {
      indexes.add(index);
      expectedBuilder.put(index, expectedLargeDatasetPercentile(index));
    }
    Random random = new Random(770683168895677741L);
    Collections.shuffle(indexes, random);

        firstLineInnerMap.put("_index", index);
        firstLineInnerMap.put("_type", type);
        firstLineInnerMap.put("_id", item.getId());
        firstLineMap.put("index", firstLineInnerMap);

        final Map<String, Object> secondLine = new HashMap<>();

        secondLine.put("text", item.getText());

        // reading

      if (containsNaN(dataset)) {
        Map<Integer, Double> nanMap = new LinkedHashMap<>();
        for (int index : indexes) {
          nanMap.put(index, NaN);
        }
        return unmodifiableMap(nanMap);
      }

      // Calculate the quotients and remainders in the integer division x = k * (N - 1) / q, i.e.

  }

  /**
   * Inserts element at current put position, advances, and signals. Call only when occupying
   * monitor.
   */
  private void insert(E x) {
    items[putIndex] = x;
    putIndex = inc(putIndex);
    ++count;
  }

  /**
   * Extracts element at current take position, advances, and signals. Call only when occupying
   * monitor.
   */
  private E extract() {