code: public function purgeOldFeeds()
  	{
  		$arrFeeds = array();
  		$objFeeds = NewsFeedModel::findAll();
  
  		if ($objFeeds !== null)
  		{
  			while ($objFeeds->next())
  			{
  				$arrFeeds[] = $objFeeds->alias ?: 'news' . $objFeeds->id;
  			}
  		}
  
  		return $arrFeeds;
  	}
docs: Return the names of the existing feeds so they are not removed
  
  @return array