code: protected function quote(/*# string */ $str)/*# : string */
      {
          return $this->getDialect()->quote(
              $str,
              $this->getSettings()['autoQuote'] ?
              DialectInterface::QUOTE_YES :
              DialectInterface::QUOTE_NO
          );
      }
docs: Quote SQL identifier base on settings
  
  @param  string $str
  @return string
  @access protected