@Override
    public List<String> selectList(String text) {
        throw new UnsupportedOperationException();
    }
Borrowed from https://code.google.com/p/cx-extractor/

@author code4crafter@gmail.com <br>
@since 0.4.1
webmagic-core/src/main/java/us/codecraft/webmagic/selector/SmartContentSelector.java