34 include_once 
'Services/Tracking/classes/class.ilLPCollections.php';
 
   38         function &
_getItems($a_obj_id, $a_use_subtree_by_id = 
false)
 
   40                 static $cache = array();
 
   42                 if(isset($cache[$a_obj_id]))
 
   44                         return $cache[$a_obj_id];
 
   47                 return $cache[$a_obj_id];