public function toObject($coreFilter = null, $props_to_skip = array())
 {
     if (is_null($coreFilter)) {
         $coreFilter = new entryFilter();
     }
     return parent::toObject($coreFilter, $props_to_skip);
 }
 public function getOrderByMap()
 {
     return array_merge(parent::getOrderByMap(), self::$order_by_map);
 }
 public function getMapBetweenObjects()
 {
     return array_merge(parent::getMapBetweenObjects(), $this->map_between_objects);
 }