/**
  * Mass loading of CExObjects
  *
  * @param self[] $list List of ExLinks
  *
  * @return void
  */
 static function massLoadExObjects(array $list)
 {
     $ex_object_id_by_ex_class = array();
     $ex_links_by_ex_class = array();
     foreach ($list as $_link) {
         $_ex_class_id = $_link->ex_class_id;
         $ex_object_id_by_ex_class[$_ex_class_id][] = $_link->ex_object_id;
         $ex_links_by_ex_class[$_ex_class_id][] = $_link;
     }
     foreach ($ex_object_id_by_ex_class as $_ex_class_id => $_ex_object_ids) {
         $_ex_object = new CExObject($_ex_class_id);
         $where = array("ex_object_id" => $_ex_object->getDS()->prepareIn($_ex_object_ids));
         $_ex_objects = $_ex_object->loadList($where);
         /** @var CExLink $_link */
         foreach ($ex_links_by_ex_class[$_ex_class_id] as $_link) {
             $_link->_ref_ex_object = $_ex_objects[$_link->ex_object_id];
         }
     }
 }