/**
  * Clone dependencies 
  *
  * @param int $a_ref_id
  * @param int $a_target_id
  * @param int $a_copy_id
  */
 public static function cloneDependencies($a_ref_id, $a_target_id, $a_copy_id)
 {
     global $ilLog;
     $ilLog->write(__METHOD__ . ': Begin course items...');
     $items = self::getItems($a_ref_id);
     if (!$items) {
         $ilLog->write(__METHOD__ . ': No course items found.');
         return true;
     }
     // new course item object
     if (!is_object($new_container = ilObjectFactory::getInstanceByRefId($a_target_id, false))) {
         $ilLog->write(__METHOD__ . ': Cannot create target object.');
         return false;
     }
     include_once 'Services/CopyWizard/classes/class.ilCopyWizardOptions.php';
     $cp_options = ilCopyWizardOptions::_getInstance($a_copy_id);
     $mappings = $cp_options->getMappings();
     foreach ($items as $item) {
         if (!isset($mappings[$item['parent_id']]) or !$mappings[$item['parent_id']]) {
             $ilLog->write(__METHOD__ . ': No mapping for parent nr. ' . $item['parent_id']);
             continue;
         }
         if (!isset($mappings[$item['obj_id']]) or !$mappings[$item['obj_id']]) {
             $ilLog->write(__METHOD__ . ': No mapping for item nr. ' . $item['obj_id']);
             continue;
         }
         $new_item_id = $mappings[$item['obj_id']];
         $new_parent = $mappings[$item['parent_id']];
         $new_item = new self();
         $new_item->setTimingType($item['timing_type']);
         $new_item->setTimingStart($item['timing_start']);
         $new_item->setTimingEnd($item['timing_end']);
         $new_item->setSuggestionStart($item['suggestion_start']);
         $new_item->setSuggestionEnd($item['suggestion_end']);
         $new_item->toggleChangeable($item['changeable']);
         $new_item->setEarliestStart($item['earliest_start']);
         $new_item->setLatestEnd($item['latest_end']);
         $new_item->toggleVisible($item['visible']);
         $new_item->update($new_item_id, $new_parent);
         $ilLog->write(__METHOD__ . ': Added new entry for item nr. ' . $item['obj_id']);
     }
     $ilLog->write(__METHOD__ . ': Finished course items.');
 }