import java.util.List;

/**
 * Represents a set of Sitemaps, which can be either a UrlSet or an Index.
 * This class provides methods to manage a list of Sitemap objects and determine the type of the SitemapSet.
 *
 */
public class SitemapSet implements Serializable {

    private static final long serialVersionUID = 1L;

    /** Constant for UrlSet type. */
    public static final String URLSET = "UrlSet";

     * @param in the input stream to parse
     * @return the parsed sitemap set
     */
    protected SitemapSet parseTextSitemaps(final InputStream in) {
        final SitemapSet sitemapSet = new SitemapSet();
        sitemapSet.setType(SitemapSet.URLSET);

        try {
            final BufferedReader br = new BufferedReader(new InputStreamReader(in, Constants.UTF_8));
            String line;

        try (final InputStream responseBody = responseData.getResponseBody()) {
            final SitemapSet sitemapSet = sitemapsHelper.parse(responseBody);
            final Set<RequestData> requestDataSet = new LinkedHashSet<>();
            for (final Sitemap sitemap : sitemapSet.getSitemaps()) {
                if (sitemap != null) {