void testRetriableExceptions() {
        // Test non-retriable errors
        SmbException accessDenied = new SmbException(NtStatus.NT_STATUS_ACCESS_DENIED, false);
        // Note: isRetriable() method does not exist in SmbException
        assertNotNull(accessDenied);

        SmbException notFound = new SmbException(NtStatus.NT_STATUS_OBJECT_NAME_NOT_FOUND, false);
        assertNotNull(notFound);