/**
  * This method checks if an action is valid and either returns a result
  * or an error, as appropriate.
  *
  * @access private
  *
  * @param boolean $result
  * @return boolean
  */
 function _validateResult($result)
 {
     if ($result) {
         return true;
     } else {
         $this->raiseError($this->_dllCampaign->getLastError());
         return false;
     }
 }