.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())));

            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);

import com.google.gwt.junit.client.GWTTestCase;
import com.google.gwt.junit.tools.GWTTestSuite;
import java.io.IOException;
import junit.framework.Test;
import junit.framework.TestCase;

/**
 * Runs all _gwt tests. Grouping them into a suite is much faster than running each as a one-test
 * "suite," as the per-suite setup is expensive.
 */
public class GwtTestSuite extends TestCase {
  public static Test suite() throws IOException {

     */
    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}.

     * <p>
     * The implementation may optimize the execution by:
     * <ul>
     *   <li>Returning cached results for previously executed requests</li>
     *   <li>Grouping similar requests for batch processing</li>
     *   <li>Processing requests in parallel where appropriate</li>
     * </ul>
     *
     * @param <REQ> The request type
     * @param <REP> The response type