return memoryRegion;
    }

    /**
     * Check if request is completed
     *
     * @return true if completed, false otherwise
     */
    public boolean isCompleted() {
        return completed;
    }

    /**
     * Mark request as completed
     */
    public void markCompleted() {
        this.completed = true;
    }

    /**

        // Cache should be invalidated
        assertFalse(cacheEntry.isComplete());

        // Step 9: Test lease break
        // Re-populate cache
        directoryLeaseManager.updateDirectoryCache(directoryPath, files);
        assertTrue(cacheEntry.isComplete());

        // Simulate lease break with loss of read cache

        DirectoryCacheEntry cacheEntry = directoryLeaseManager.getCacheEntry(directoryPath);
        assertNotNull(cacheEntry);
        assertTrue(cacheEntry.isComplete());
        assertEquals(2, cacheEntry.getChildren().size());

        // Verify the cached files have correct names
        List<DirectoryCacheEntry.FileInfo> children = cacheEntry.getChildren();

        return leaseKey;
    }

    /**
     * Checks if the complete directory enumeration has been cached
     * @return true if full enumeration is cached
     */
    public boolean isComplete() {
        return isComplete;
    }

    /**
     * Gets the cache scope (ALL or IMMEDIATE_CHILDREN)
     * @return the cache scope
     */
    public DirectoryCacheScope getScope() {
        return scope;

        try {
            this.isComplete = true;
            this.hasChanges = false;
            this.lastUpdateTime = System.currentTimeMillis();
        } finally {
            lock.writeLock().unlock();
        }
    }
    
    public void invalidate() {
        lock.writeLock().lock();
        try {
            children.clear();
            isComplete = false;
            hasChanges = true;

    public void testMarkComplete() {
        entry.updateChild("file1.txt", 1024L, 1000L, false, 0x20, 500L, 800L);
        assertTrue(entry.hasChanges());
        assertFalse(entry.isComplete());

        entry.markComplete();

        assertTrue(entry.isComplete());
        assertFalse(entry.hasChanges()); // Changes are cleared when marked complete
    }

    @Test
    public void testInvalidate() {

                if (parentPath != null) {
                    var parentCache = dirManager.getCacheEntry(parentPath);
                    if (parentCache != null && parentCache.isComplete()) {
                        boolean exists = parentCache.hasChild(smbFile.getName());
                        log.debug("Using cached existence check for: {}", smbFile.getPath());
                        return exists;

     */
    public List<SmbFile> getCachedDirectoryListing(String directoryPath) {
        DirectoryCacheEntry entry = getCacheEntry(directoryPath);
        if (entry == null || !entry.isComplete()) {
            return null;
        }

        List<SmbFile> files = new ArrayList<>();
        for (DirectoryCacheEntry.FileInfo fileInfo : entry.getChildren()) {
            try {