* from a parameter map.
 */
public class FieldConfigs {

    /**
     * Map containing field names as keys and their corresponding configuration values as values.
     */
    private final Map<String, String> params;

    /**
     * Constructs a new FieldConfigs instance with the specified parameter map.
     *

        assertTrue(fieldConfigs.getConfig("test").isEmpty());
        assertTrue(fieldConfigs.getConfig("foo").map(FieldConfigs.Config::isCache).orElse(false));
        assertFalse(fieldConfigs.getConfig("foo").map(FieldConfigs.Config::isOverwrite).orElse(false));
    }

    public void test_cache() {
        final Map<String, String> params = Maps.of("foo", "cache");

     *
     * @param dataMap the original data map to process
     * @param fieldConfigs the field configurations to apply
     * @return a new data map with configurations applied
     */
    default Map<String, Object> processFieldConfigs(final Map<String, Object> dataMap, final FieldConfigs fieldConfigs) {
        final Map<String, Object> newDataMap = new LinkedHashMap<>();

        final FessFileTransformer transformer = createInstance();
        final Map<String, String> params = Maps.of("foo", "cache", "bar", "overwrite", "baz", "cache|overwrite");
        FieldConfigs fieldConfigs = new FieldConfigs(params);
        final Map<String, Object> dataMap = Map.of(//
                "foo", new String[] { "aaa", "bbb" }, //
                "bar", new String[] { "ccc", "ddd" }, //

        String url = responseData.getUrl();
        final String indexingTarget = crawlingConfig.getIndexingTarget(url);
        url = pathMappingHelper.replaceUrl(sessionId, url);

        final FieldConfigs fieldConfigs = new FieldConfigs(crawlingConfig.getConfigParameterMap(ConfigName.FIELD));

        String urlEncoding;
        final UrlQueue<?> urlQueue = CrawlingParameterUtil.getUrlQueue();

        url = pathMappingHelper.replaceUrl(sessionId, url);
        final String mimeType = responseData.getMimeType();

        final FieldConfigs fieldConfigs = new FieldConfigs(crawlingConfig.getConfigParameterMap(ConfigName.FIELD));
        final Map<String, String> xpathConfigMap = crawlingConfig.getConfigParameterMap(ConfigName.XPATH);

        String urlEncoding;

        final FessXpathTransformer transformer = new FessXpathTransformer();
        final Map<String, String> params = Maps.of("foo", "cache", "bar", "overwrite", "baz", "cache|overwrite");
        FieldConfigs fieldConfigs = new FieldConfigs(params);
        final Map<String, Object> dataMap = Map.of(//
                "foo", new String[] { "aaa", "bbb" }, //
                "bar", new String[] { "ccc", "ddd" }, //