final DeleteForm form = new DeleteForm();
        assertNull(form.q);
        assertNull(form.docId);

        form.q = "test query";
        form.docId = "doc-123";

        assertEquals("test query", form.q);
        assertEquals("doc-123", form.docId);
    }

    @Test
    public void test_listForm_defaults() {
        final ListForm form = new ListForm();

            0, 0, null, null, false, null, null, null, null, null, false);
    protected final ColumnInfo _columnDocId = cci("docId", "docId", null, null, String.class, "docId", null, false, false, false, "keyword",
            0, 0, null, null, false, null, null, null, null, null, false);

{
    "properties": {
      "userInfoId": {
        "type": "keyword"
      },
      "url": {
        "type": "keyword"
      },
      "docId": {
        "type": "keyword"
      },
      "queryId": {
        "type": "keyword"
      },
      "createdAt": {
        "type": "date",
        "format": "date_optional_time"
      }
    }

 */
public class ThumbnailForm {

    /**
     * The document ID for which to retrieve the thumbnail.
     */
    @Required
    @Size(max = 100)
    public String docId;

    /**
     * The query ID associated with the search request.
     */
    @Required
    public String queryId;

    /**
     * The search query string for error page display.
     */

            if (setting.containsKey(idKey)) {
                requestBody.put(idKey, setting.get(idKey));
            }

            final Map<String, Object> doc = new HashMap<>();
            doc.put("doc_id", setting.get("doc_id"));
            doc.put("url", setting.get("url_link"));
            doc.put("title", setting.get("title"));
            doc.put("role", "Rguest");
            doc.put("boost", setting.get("boost"));

        Map<String, Object> dataMap = new HashMap<>();
        dataMap.put("url", "http://example.com/test");
        dataMap.put("doc_id", "existing-doc-id");

        indexUpdateCallback.store(paramMap, dataMap);

        // Should keep existing doc_id
        assertEquals("existing-doc-id", dataMap.get("doc_id"));
    }

    @Test
    public void test_concurrentStore() throws Exception {
        // Test thread safety

     */
    @Size(max = 1000)
    public String q;

    /**
     * The document ID of the document to delete.
     * Required field for identifying the specific document.
     */
    @Required
    public String docId;

    }

    /**
     * Document identifier for the target document to redirect to.
     * This is required and limited to 100 characters.
     */
    @Required
    @Size(max = 100)
    public String docId;

    /**
     * Redirect target or return URL parameter.
     * This is required and limited to 10000 characters to accommodate long URLs.
     */
    @Size(max = 10000)
    @Required
    public String rt;

 * Contains parameters for document caching and error page display.
 */
public class CacheForm {

    /** Document ID for cache operations. */
    @Required
    @Size(max = 100)
    public String docId;

    /** Highlight query parameters. */
    public String[] hq;

    /** Search query parameter for error page. */
    public String q;

    /** Number of results parameter for error page. */

            doColumn("_id");
        }

        public void columnCreatedAt() {
            doColumn("createdAt");
        }

        public void columnDocId() {
            doColumn("docId");
        }

        public void columnQueryId() {
            doColumn("queryId");
        }

        public void columnUrl() {
            doColumn("url");
        }