authorMapper,
keywordsMapper,
contentTypeMapper,
contentLengthMapper,
languageMapper);
<BUG>return CollectionUtils.concat(super.iterator(), extras.iterator());
</BUG>
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {

authorMapper,
keywordsMapper,
contentTypeMapper,
contentLengthMapper,
languageMapper);
return Iterators.concat(super.iterator(), extras.iterator());
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
