@Override
    public String getLocalName(int index) {
        if (index < 0 && index >= permutation.length) {
            return null;
        }
        return delegate.getLocalName(permutation[index]);
    }
@param index
@return
@see org.xml.sax.Attributes#getLocalName(int)
src/nu/validator/xml/PermutingAttributesWrapper.java