/**
* Helper method to change the case of the strings used
* when returning result sets in FETCH_ASSOC and FETCH_BOTH
* modes.
*
* This is not intended to be used by application code,
* but the method must be public so the Statement class
* can invoke it.
*
* @param string $key
* @return string
*/
public function foldCase($key)
{
return $this->adapter->foldCase($key);
}