* @param scope cache scope
     * @return lease key or null if not supported
     * @throws SmbException if an error occurs
     */
    public static Smb2LeaseKey requestDirectoryLease(SmbFile smbFile, int requestedState, DirectoryCacheScope scope) throws SmbException {
        if (!smbFile.isDirectory()) {
            throw new SmbException("Directory leasing only supported for directories");
        }

        
        // Schedule periodic cache cleanup
        scheduler.scheduleAtFixedRate(this::cleanupExpiredEntries, 60, 60, TimeUnit.SECONDS);
    }
    
    public Smb2LeaseKey requestDirectoryLease(String directoryPath, 
                                             int requestedState, 
                                             DirectoryCacheScope scope) {
        // Request base lease

        directoryLeaseManager.requestDirectoryLease(dir1, DirectoryLeaseState.DIRECTORY_READ_HANDLE,
                DirectoryCacheScope.IMMEDIATE_CHILDREN);
        directoryLeaseManager.requestDirectoryLease(dir2, DirectoryLeaseState.DIRECTORY_READ_HANDLE, DirectoryCacheScope.METADATA_ONLY);
        directoryLeaseManager.requestDirectoryLease(dir3, DirectoryLeaseState.DIRECTORY_FULL, DirectoryCacheScope.RECURSIVE_TREE);

        // Request leases for both directories
        Smb2LeaseKey key1 = directoryLeaseManager.requestDirectoryLease(dir1, DirectoryLeaseState.DIRECTORY_READ_HANDLE,
                DirectoryCacheScope.IMMEDIATE_CHILDREN);

        Smb2LeaseKey key2 =
                directoryLeaseManager.requestDirectoryLease(dir2, DirectoryLeaseState.DIRECTORY_FULL, DirectoryCacheScope.RECURSIVE_TREE);

        assertNotNull(key1);