// unwrapDOSFilter is a private static method on SmbEnumerationUtil
            Class<?> utilClass = SmbEnumerationUtil.class;

            // Act
            Object unwrapped = invokePrivate(utilClass, "unwrapDOSFilter", new Class<?>[] { ResourceFilter.class }, wrapper);

            // Assert
            assertNotNull(unwrapped);

            final ResourceFilter ff) throws CIFSException {
        final DosFileFilter dff = unwrapDOSFilter(ff);
        if (dff != null) {
            if (dff.wildcard != null) {
                wildcard = dff.wildcard;
            }
            searchAttributes = dff.attributes;
        }