code: public static function findByCalendar($intId, array $arrOptions=array())
  	{
  		$t = static::$strTable;
  
  		return static::findBy(array("$t.calendars LIKE '%\"" . (int) $intId . "\"%'"), null, $arrOptions);
  	}
docs: Find all feeds which include a certain calendar
  
  @param integer $intId      The calendar ID
  @param array   $arrOptions An optional options array
  
  @return Collection|CalendarFeedModel[]|CalendarFeedModel|null A collection of models or null if the calendar is not part of a feed