* @param keyList The list of keys to register this extractor under.
     */
    public void register(final List<String> keyList) {
        if (keyList == null || keyList.isEmpty()) {
            throw new IllegalArgumentException("keyList must not be null or empty.");
        }
        getExtractorFactory().addExtractor(keyList, this);
    }

    /**
     * Returns the MimeTypeHelper instance from the CrawlerContainer.

     *
     * @param defaultEncoding the default encoding to set
     * @throws IllegalArgumentException if the default encoding is blank
     */
    public void setDefaultEncoding(final String defaultEncoding) {
        if (StringUtil.isBlank(defaultEncoding)) {
            throw new IllegalArgumentException("Default encoding must not be blank.");
        }
        this.defaultEncoding = defaultEncoding;
    }

        try {
            settings.badword().add("aaaa");
            assertTrue(true);
        } catch (IllegalArgumentException e) {
            fail();
        }

        try {
            settings.badword().add("");
            fail();
        } catch (IllegalArgumentException e) {
            assertTrue(true);
        }

        try {
            settings.badword().add("aaaa bbb");

            fail("Should throw IllegalArgumentException for empty string");
        } catch (IllegalArgumentException e) {
            // Expected
        }

        try {
            CrawlerStatus.valueOf(" RUNNING "); // with spaces
            fail("Should throw IllegalArgumentException for value with spaces");
        } catch (IllegalArgumentException e) {
            // Expected
        }
    }

                return minioClient.getObject(args);
            } catch (InvalidKeyException | ErrorResponseException | IllegalArgumentException | InsufficientDataException | InternalException
                    | InvalidResponseException | NoSuchAlgorithmException | XmlParserException | IOException | ServerException e) {

        Exception cause = new IllegalArgumentException("Root cause");
        CrawlerSystemException exception = new CrawlerSystemException(cause);

        assertNotNull(exception);
        assertSame(cause, exception.getCause());
        // When constructed with cause only, message should be cause's toString()
        assertEquals("java.lang.IllegalArgumentException: Root cause", exception.getMessage());
    }

        }

        final String validationError = getValidationError(badWord);
        if (validationError != null) {
            throw new IllegalArgumentException("Validation error. " + validationError);
        }
        arraySettings.add(BAD_WORD_SETTINGD_KEY, badWord);
    }

    /**
     * Delete a bad word.
     * @param badWord Bad word
     */

                        .execute()
                        .actionGet(settings.getIndicesTimeout());
                return analyzeResponse.getTokens();
            } catch (final IllegalArgumentException e) {
                return analyze(text, field, lang);
            }
        }
    }

    /**
     * Check if the language is supported.
     * @param lang Language

     * @param maxClientFactorySize The maximum size.
     */
    public void setMaxClientFactorySize(final int maxClientFactorySize) {
        if (maxClientFactorySize <= 0) {
            throw new IllegalArgumentException("maxClientFactorySize must be positive.");
        }
        this.maxClientFactorySize = maxClientFactorySize;
    }

     */
    public Deferred<T>.Promise execute(final Client client) {
        final String error = getValidationError();
        if (!Strings.isNullOrEmpty(error)) {
            throw new IllegalArgumentException(error);
        }

        final Deferred<T> deferred = new Deferred<>();
        try {
            processRequest(client, deferred);
        } catch (final Exception e) {