src/Zicht/Bundle/UrlBundle/Form/DataTransformer/AbstractAliasingTransformer.php
final public function map($data, $mode)
    {
        if (null === $data) {
            return $data;
        }

        return $this->doMap($data, $mode);
    }
final public function map($data, $mode)
    {
        if (null === $data) {
            return $data;
        }

        return $this->doMap($data, $mode);
    }
final public function map ( $ data , $ mode ) { if ( null === $ data ) { return $ data ; } return $ this -> doMap ( $ data , $ mode ) ; }
Wraps the doMap to defend for the 'null'-value case

@param string $data
@param string $mode
@return string
Wraps the doMap to defend for the null - value case