*/
    public Promise then(final Consumer<RESPONSE> consumer) {
        return promise.then(consumer);
    }

    /**
     * Registers a callback to be executed when the computation fails.
     * @param consumer The callback.
     * @return The promise.
     */
    public Promise error(final Consumer<Throwable> consumer) {
        return promise.error(consumer);
    }

    /**

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.exception;

/**
 * Exception thrown when command execution fails.
 * This exception indicates that an external command or process execution encountered an error.
 */
public class CommandExecutionException extends FessSystemException {

    private static final long serialVersionUID = 1L;

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.exception;

/**
 * Exception thrown when thumbnail generation fails.
 * This exception is used for errors during thumbnail creation and processing.
 */
public class ThumbnailGenerationException extends FessSystemException {

    private static final long serialVersionUID = 1L;

    /**

         *
         * @param notification the witness notification
         */
        void onWitnessNotification(WitnessNotification notification);

        /**
         * Called when a witness registration fails.
         *
         * @param registration the failed registration
         * @param error the error that occurred
         */
        void onRegistrationFailed(WitnessRegistration registration, Exception error);

 * This form extends CreateForm to include fields necessary for updating existing data config entries,
 * including tracking information for optimistic locking and audit trails.
 * Data configs define how to crawl and extract data from databases, CSV files, and other data sources.
 *
 */
public class EditForm extends CreateForm {

    /**
     * Creates a new EditForm instance.
     */

/**
 * Form class for editing user groups in the admin interface.
 * This form extends CreateForm to include fields necessary for updating existing group entries,
 * including tracking information for optimistic locking and audit trails.
 * Groups are used to organize users and define access permissions.
 *
 */
public class EditForm extends CreateForm {

    /**
     * Creates a new EditForm instance.
     */
    public EditForm() {

 * This form extends CreateForm to include fields necessary for updating existing path map entries,
 * including tracking information for optimistic locking and audit trails.
 * Path mappings are used to transform document URLs and paths during indexing and display.
 *
 */
public class EditForm extends CreateForm {

    /**
     * Creates a new EditForm instance.
     */

 * This form extends CreateForm to include fields necessary for updating existing related content entries,
 * including tracking information for optimistic locking and audit trails.
 * Related content configurations define relationships between documents for enhanced search results.
 *
 */
public class EditForm extends CreateForm {

    /**
     * Creates a new EditForm instance.
     */

 * This form extends CreateForm to include fields necessary for updating existing web authentication entries,
 * including tracking information for optimistic locking and audit trails.
 * Web authentication configurations define credentials for accessing protected web resources during crawling.
 */
public class EditForm extends CreateForm {

    /**
     * Creates a new EditForm instance.
     */

/**
 * Form class for editing access tokens in the admin interface.
 * This form extends CreateForm to include fields necessary for updating existing access tokens,
 * including tracking information for optimistic locking and audit trails.
 *
 */
public class EditForm extends CreateForm {

    /**
     * Creates a new EditForm instance.
     */
    public EditForm() {
        super();
    }

    /**