* @param validationMessagesLambda lambda function that adds validation messages
     * @return concatenated string of localized validation messages separated by spaces
     */
    protected String getMessage(final VaMessenger<FessMessages> validationMessagesLambda) {
        final FessMessages messages = new FessMessages();
        validationMessagesLambda.message(messages);

     * @param message the message to be logged
     * @param error the associated exception, or null if not applicable
     */
    void log(@Nonnull Level level, @Nonnull String message, @Nullable Throwable error);

    /**
     * Logs a debug message without an associated exception.
     *
     * @param message the debug message to be logged
     */
    default void debug(String message) {
        log(Level.DEBUG, message);

        assertNull(exception.getMessage(), "Message should be null for no-arg constructor");
        assertNull(exception.getCause(), "Cause should be null for no-arg constructor");
    }

    @Test
    void testMessageConstructor() {
        // Test the constructor with a message argument
        String message = "Test message";
        RequestTimeoutException exception = new RequestTimeoutException(message);

     * Constructs a new SpnegoException with no detail message
     */
    public SpnegoException() {
    }

    /**
     * Constructs a new SpnegoException with the specified detail message and cause
     * @param message the detail message
     * @param cause the cause of this exception
     */
    public SpnegoException(final String message, final Throwable cause) {
        super(message, cause);
    }

    /**

    private static final long serialVersionUID = 1L;

    /**
     * Constructs a new LDAP configuration exception with the specified detail message.
     *
     * @param message The detail message.
     */
    public LdapConfigurationException(final String message) {
        super(message);
    }

    /**
     * Creates a new MaxLengthExceededException with the specified detail message.
     *
     * @param message the detail message explaining the reason for the exception
     */
    public MaxLengthExceededException(final String message) {
        super(message);
    }

    public CurlException(final String message, final Throwable cause) {
        super(message, cause);
    }

    /**
     * Constructs a new CurlException with the specified detail message.
     *
     * @param message the detail message (which is saved for later retrieval by the {@link #getMessage()} method).
     */
    public CurlException(final String message) {
        super(message);
    }

    }

    /**
     * @param message a message
     * @param cause a cause
     * @deprecated use {@link #ArtifactMetadataRetrievalException(String, Throwable, Artifact)}
     */
    @Deprecated
    public ArtifactMetadataRetrievalException(String message, Throwable cause) {
        this(message, cause, null);
    }

    public ArtifactMetadataRetrievalException(String message, Throwable cause, Artifact artifact) {

        super(message, cause);
    }

    /**
     * Constructs a new RobotsTxtException with the specified detail message.
     * @param message the detail message
     */
    public RobotsTxtException(final String message) {
        super(message);
    }

        assertNull(exception.getMessage(), "Message should be null for no-arg constructor");
        assertNull(exception.getCause(), "Cause should be null for no-arg constructor");
    }

    @Test
    void testStringConstructor() {
        // Test the constructor with a message
        String message = "Connection timed out.";