CACHE_SPEC.put(spec, cached);
        return cached;
    }

    private static Restriction parseRestriction(String spec) throws InvalidVersionSpecificationException {
        boolean lowerBoundInclusive = spec.startsWith("[");
        boolean upperBoundInclusive = spec.endsWith("]");

        String process = spec.substring(1, spec.length() - 1).trim();

        Restriction restriction;

            list = (ListItem) stack.pop();
            list.normalize();
        }
    }

    private static Item parseItem(boolean isDigit, String buf) {
        return parseItem(false, isDigit, buf);
    }

    private static Item parseItem(boolean isCombination, boolean isDigit, String buf) {
        if (isCombination) {
            return new CombinationItem(buf.replace("-", ""));
        } else if (isDigit) {

     * @return {@literal true} if the method is {@literal equals(Object)}
     */
    public static boolean isEqualsMethod(final Method method) {
        assertArgumentNotNull("method", method);

        return method != null && method.getName().equals("equals") && method.getReturnType() == boolean.class
                && method.getParameterTypes().length == 1 && method.getParameterTypes()[0] == Object.class;
    }

        private Boolean explain;

        private Float minScore;

        private String preference;

        private String routing;

        private String searchType;

        private long timeoutInMillis = -1;

        private Boolean version;

        private Boolean seqNoAndPrimaryTerm = Boolean.TRUE;

        private int terminateAfter = 0;

        private Boolean explain;

        private Float minScore;

        private String preference;

        private String routing;

        private String searchType;

        private long timeoutInMillis = -1;

        private Boolean version;

        private Boolean seqNoAndPrimaryTerm = Boolean.TRUE;

        private int terminateAfter = 0;

    }

    @Override
    public boolean isFatalEnabled() {
        return logger.isFatalEnabled();
    }

    @Override
    public void fatal(final String message) {
        logger.fatal(message);
    }

    @Override
    public void fatal(final String message, final Throwable t) {
        logger.fatal(message, t);
    }

    @Override
    public boolean isErrorEnabled() {

            return parent.toArray(a);
        }

        @Override
        public boolean add(final E e) {
            return parent.add(e);
        }

        @Override
        public boolean remove(final Object o) {
            return parent.remove(o);
        }

        @Override
        public boolean containsAll(final Collection<?> c) {
            return parent.containsAll(c);
        }

        boolean result1 = indexUpdateCallback.isUrlCrawlable(paramMap, "http://example.com/admin/config.html");
        boolean result2 = indexUpdateCallback.isUrlCrawlable(paramMap, "http://example.com/private/data.html");
        boolean result3 = indexUpdateCallback.isUrlCrawlable(paramMap, "http://example.com/temp/cache.html");

    private String domainController;

    /** Flag to enable load balancing across domain controllers */
    private boolean loadBalance;

    /** Flag to enable basic authentication */
    private boolean enableBasic;

    /** Flag to allow insecure basic authentication */
    private boolean insecureBasic;

    /** The authentication realm */
    private String realm;

        void testThreadSafety() throws InterruptedException {
            int threadCount = 10;
            Thread[] threads = new Thread[threadCount];
            boolean[] success = new boolean[threadCount];

            for (int i = 0; i < threadCount; i++) {
                final int index = i;
                threads[i] = new Thread(() -> {
                    try {