function awakeInSession(&$oForm)
 {
     parent::awakeInSession($oForm);
     $aKeys = array_keys($this->aOColumns);
     reset($aKeys);
     while (list(, $sKey) = each($aKeys)) {
         $sName = $this->aOColumns[$sKey];
         if (!is_object($sName)) {
             unset($this->aOColumns[$sKey]);
             $this->aOColumns[$sKey] =& $this->oForm->aORenderlets[$sName];
         }
     }
     $this->aChilds =& $this->aOColumns;
 }