extensionsBuilder = new ClassDocExtensionsBuilder(model, listener);
        superTypeBuilder = new ClassDocSuperTypeBuilder(model, listener);
    }

    void build(ClassDoc classDoc) {
        listener.start(String.format("class %s", classDoc.getName()));
        try {
            superTypeBuilder.build(classDoc);
            commentBuilder.build(classDoc);
            propertiesBuilder.build(classDoc);

    WaiterThread waiter = new WaiterThread(future);
    waiter.start();
    waiter.awaitWaiting();
    PollingThread poller = new PollingThread(future);
    poller.start();
    PollingThread poller2 = new PollingThread(future);
    poller2.start();
    PollingThread poller3 = new PollingThread(future);
    poller3.start();
    poller.awaitInLoop();
    poller2.awaitInLoop();
    poller3.awaitInLoop();

        // Assert - message preserved, cause null
        assertEquals(message, ex.getMessage());
        assertNull(ex.getCause());

        // Assert - toString starts with class name and contains message when present
        if (message == null) {
            assertEquals(SMBProtocolDowngradeException.class.getName(), ex.toString());
        } else if (message.isEmpty()) {

    }

    @Override
    public int size() {
        return TRANSFORM_HEADER_SIZE;
    }

    @Override
    public int encode(final byte[] dst, int dstIndex) {
        final int start = dstIndex;

        // Protocol ID
        SMBUtil.writeInt4(TRANSFORM_PROTOCOL_ID, dst, dstIndex);
        dstIndex += 4;

        // Signature (16 bytes)

			// only the concurrency to be number of drives to start
			// with - since default '32' might be big and may not
			// complete in total time of 10s.
			if globalEndpoints.NEndpoints() < concurrency {
				concurrency = globalEndpoints.NEndpoints()
			}

			// Check if we have local disks per pool less than
			// the concurrency make sure we choose only the "start"
			// concurrency to be equal to the lowest number of

                        "start_date": {
                            "type": "string",
                            "format": "date-time",
                            "title": "Start Date",
                        },
                    },
                    "type": "object",
                    "required": ["username", "monthly_fee", "start_date"],
                    "title": "Subscription",

    }

    @Test
    @DisplayName("Should handle null in middle of multiple elements")
    void testJoinNullInMiddle() {
        String result = StringUtil.join("-", "start", null, null, "end");
        assertEquals("start-null-null-end", result);
    }

        q1x.setDaemon(true);
        q20.setDaemon(true);
        try {
            synchronized (sem) {
                q1x.start();
                q20.start();

                while (sem.count > 0 && q1x.getAnswer() == null && q20.getAnswer() == null) {
                    sem.wait();
                }
            }

    /**
     * Returns the sort.
     *
     * @return The sort.
     */
    public abstract String getSort();

    /**
     * Returns the start position.
     *
     * @return The start position.
     */
    public abstract int getStartPosition();

    /**
     * Returns the page size.
     *
     * @return The page size.
     */

            } else {
                c++;
            }
        } while (i-- > e);
        return scope.length() + 2;
    }

    int readScopeWireFormat(final byte[] src, int srcIndex) {
        final int start = srcIndex;
        int n;
        StringBuilder sb;

        n = src[srcIndex++] & 0xFF;
        if (n == 0) {
            scope = null;
            return 1;
        }

        try {