/**
  * Resets all references to other model objects or collections of model objects.
  *
  * This method is a user-space workaround for PHP's inability to garbage collect
  * objects with circular references (even in PHP 5.3). This is currently necessary
  * when using Propel in certain daemon or large-volume/high-memory operations.
  *
  * @param boolean $deep Whether to also clear the references on all referrer objects.
  */
 public function clearAllReferences($deep = false)
 {
     if ($deep && !$this->alreadyInClearAllReferencesDeep) {
         $this->alreadyInClearAllReferencesDeep = true;
         if ($this->aUser instanceof Persistent) {
             $this->aUser->clearAllReferences($deep);
         }
         if ($this->aSkill instanceof Persistent) {
             $this->aSkill->clearAllReferences($deep);
         }
         $this->alreadyInClearAllReferencesDeep = false;
     }
     // if ($deep)
     $this->aUser = null;
     $this->aSkill = null;
 }