code: public Set<PageRef> getPageLinks() {
  		synchronized(lock) {
  			if(pageLinks == null) return Collections.emptySet();
  			if(frozen) return pageLinks;
  			return AoCollections.unmodifiableCopySet(pageLinks);
  		}
  	}
docs: Gets the set of all pages this node directly links to; this does not
  include pages linked to by child elements.