.collect(Collectors.groupingBy(Pair::getFirst, Collectors.mapping(Pair::getSecond, Collectors.toList())));
        sourceMap.put("searchField", searchFieldMap);
        final Map<String, List<String>> headerMap = headerList.stream()
                .collect(Collectors.groupingBy(Pair::getFirst, Collectors.mapping(Pair::getSecond, Collectors.toList())));

                            .collect(Collectors.groupingBy(Pair::getFirst, Collectors.mapping(Pair::getSecond, Collectors.toList())));
                    appendJson("search-field", searchFieldMap, buf).append(',');
                    final Map<String, List<String>> requestHeaderMap = entity.getRequestHeaderList()
                            .stream()

   * corresponding to each key appear in the same order as they are encountered.
   *
   * <p><b>{@code Stream} equivalent:</b> {@code stream.collect(Collectors.groupingBy(keyFunction))}
   * behaves similarly, but returns a mutable {@code Map<K, List<E>>} instead, and may not preserve
   * the order of entries.
   *
   * @param keyFunction the function used to produce the key for each value

   * corresponding to each key appear in the same order as they are encountered.
   *
   * <p><b>{@code Stream} equivalent:</b> {@code stream.collect(Collectors.groupingBy(keyFunction))}
   * behaves similarly, but returns a mutable {@code Map<K, List<E>>} instead, and may not preserve
   * the order of entries.
   *
   * @param keyFunction the function used to produce the key for each value

            value = StringUtil.replace(value, groupingSeparator, "");
        }
        return value;
    }

    /**
     * Finds the separator for grouping.
     *
     * @param locale
     *            Locale
     * @return Separator for grouping
     */
    public static String findGroupingSeparator(final Locale locale) {
        final DecimalFormatSymbols symbol = getDecimalFormatSymbols(locale);

     */
    public static String normalize(final String s) {
        return normalize(s, LocaleUtil.getDefault());
    }

    /**
     * Normalizes the string representation of a number by removing grouping separators
     * and representing the decimal point with '.'.
     *
     * @param s
     *            A string representing a number
     * @param locale
     *            The locale. Must not be {@literal null}.

                    context.addQuery(boolQuery -> boolQuery.filter(geoInfo.toQueryBuilder()));
                }
            });
        }

        /**
         * Gets the collapse builder for result grouping.
         *
         * @param fessConfig the Fess configuration
         * @return the collapse builder
         */
        protected CollapseBuilder getCollapseBuilder(final FessConfig fessConfig) {

### Bug or Regression