@Override
    protected FeedReader createReader() throws Exception {
        return new VespaXMLFeedReader(stream, docMan);
    }
Unpack a stream of document operations represented as XML and push to a feed
access point.

@author Thomas Gundersen
@author Steinar Knutsen
vespaclient-core/src/main/java/com/yahoo/feedapi/XMLFeeder.java