/**
  * @access public
  *
  * @param string $source
  * @param string $destination
  * @param bool   $overwrite
  * @param int    $mode
  * @return bool
  */
 public function copy($source, $destination, $overwrite = false, $mode = false)
 {
     if ($this->authorized()) {
         return parent::copy($source, $destination, $overwrite, $mode);
     } else {
         return false;
     }
 }