private function _fetchFeedAndPrepareForAnalysis($url)
 {
     $feedFetcher = tubepress_impl_patterns_sl_ServiceLocator::getFeedFetcher();
     $context = tubepress_impl_patterns_sl_ServiceLocator::getExecutionContext();
     $useCache = $context->get(tubepress_api_const_options_names_Cache::CACHE_ENABLED);
     $rawFeed = $feedFetcher->fetch($url, $useCache);
     $this->prepareForFeedAnalysis($rawFeed);
     return $rawFeed;
 }