rem: feed.downloadCallback(nsnull); 
add: feed.downloaded(nsnull); 
context: Feed.onDownloadError = function(event) {  // XXX add error message if available and notify the user?  var request = event.target;  var url = request.channel.originalURI.spec;  var feed = gFzFeedCache[url];  if (feed)  {    debug(feed.title + " download failed");    if (feed.downloadCallback)      feed.downloadCallback(nsnull);  }  throw("error downloading feed " + url);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/b0ff9e285484cd34f5c7c115b98783bc7b4f5202/Feed.js/clean/mail/extensions/newsblog/content/Feed.js