* @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) {

                suffixWords = WordlistLoader.getWordSet(reader);
            } catch (final IOException e) {
                throw new IllegalArgumentException("Could not load " + suffixWordsFile.getAbsolutePath(), e);
            }
        } else {
            suffixWords = new CharArraySet(0, false);
        }
    }

    @Override

     * </p>
     *
     * @param value the object to be converted to a list of strings
     * @return a list of strings representing the given object
     * @throws IllegalArgumentException if the object is not a string or a list
     */
    public static List<String> getAsList(final Object value) {
        if (value == null) {
            return new ArrayList<>();
        }

        assertEquals(2.5f, item2.getUserBoost(), 0.001f); // Should keep the value
    }

    @Test(expected = IllegalArgumentException.class)
    public void testMergeDifferentIds() {
        // Test that merge throws exception for different IDs
        String[] text1 = { "item1" };
        String[][] readings1 = { { "read1" } };

            if (map != null) {
                synonymMap = map;
                fst = synonymMap.fst;
                if (fst == null) {
                    throw new IllegalArgumentException("fst must be non-null");
                }
                fstReader = fst.getBytesReader();
                scratchArc = new FST.Arc<>();
                clearAttributes();
            }
        }

     */
    @Override
    public ResponseData doGet(final String url) {
        HttpUriRequest httpGet;
        try {
            httpGet = new HttpGet(url);
        } catch (final IllegalArgumentException e) {
            throw new CrawlingAccessException("The url may not be valid: " + url, e);
        }
        return doHttpMethod(url, httpGet);
    }

    /*
     * (non-Javadoc)
     *

        assertNotNull(resultList);
        assertEquals(3, resultList.size());
        assertEquals(originalList, resultList);
    }

    @Test(expected = IllegalArgumentException.class)
    public void testGetAsListWithInvalidType() {
        // Test with invalid type (should throw exception)
        SuggestUtil.getAsList(123);
    }

    @Test

     * @return The merged suggest item.
     */
    public static SuggestItem merge(final SuggestItem item1, final SuggestItem item2) {
        if (!item1.getId().equals(item2.getId())) {
            throw new IllegalArgumentException("Item id is mismatch.");
        }

        final SuggestItem mergedItem = new SuggestItem();

        mergedItem.id = item1.getId();
        mergedItem.text = item1.getText();