}

    public void test_sessionIdGetterSetter() {
        // Test session ID getter/setter
        UrlQueueImpl<Long> queue = new UrlQueueImpl<>();

        String sessionId = "session456";
        queue.setSessionId(sessionId);
        assertEquals(sessionId, queue.getSessionId());

        queue.setSessionId(null);
        assertNull(queue.getSessionId());
    }