code: public static function findByIds($arrIds, array $arrOptions=array())
  	{
  		if (empty($arrIds) || !\is_array($arrIds))
  		{
  			return null;
  		}
  
  		$t = static::$strTable;
  
  		return static::findBy(array("$t.id IN(" . implode(',', array_map('\intval', $arrIds)) . ")"), null, $arrOptions);
  	}
docs: Find news feeds by their IDs
  
  @param array $arrIds     An array of news feed IDs
  @param array $arrOptions An optional options array
  
  @return Collection|NewsFeedModel[]|NewsFeedModel|null A collection of models or null if there are no feeds