add: if (!aNewLink) return;  
context:   set link (aNewLink)  {    var ds = getSubscriptionsDS(this.server);    aNewLink = rdf.GetLiteral(aNewLink);    var old_link = ds.GetTarget(this.resource, RSS_LINK, true);    if (old_link)      ds.Change(this.resource, RSS_LINK, old_link, aNewLink);    else      ds.Assert(this.resource, RSS_LINK, aNewLink, true);  },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/10234/77a7a3082caca0e9759a774575d483db6f6fc1c4/Feed.js/clean/mail/extensions/newsblog/content/Feed.js