LOG.debug("getDocumentSet took " + (System.currentTimeMillis() - start));
	public DocumentSet getDocumentSet() {		long start = System.currentTimeMillis();		DocumentSet ds = new DocumentSet();		NodeProxy p;		for(Iterator i = iterator(); i.hasNext(); ) {			p = (NodeProxy)i.next();			ds.add(p.doc);		}		LOG.debug("getDocumentSet took " + (System.currentTimeMillis() - start));		return ds;	}