/**
  * Gets reference to the SkipTokenInfo object holding result of 
  * skiptoken parsing, which used by the IDSQP implementor for 
  * custom paging.
  * 
  * @return SkipTokenInfo
  */
 public function getSkipTokenInfo()
 {
     if (is_null($this->_skipTokenInfo)) {
         $orderbyInfo = $this->_internalOrderByInfo->getOrderByInfo();
         $this->_skipTokenInfo = new SkipTokenInfo($orderbyInfo, $this->_orderByValuesInSkipToken);
     }
     return $this->_skipTokenInfo;
 }