public function getMD5()
    {
        if (!$this->md5) {
            $this->md5 = $this->media->getHash('md5');
        }

        return $this->md5;
    }
public function getMD5()
    {
        if (!$this->md5) {
            $this->md5 = $this->media->getHash('md5');
        }

        return $this->md5;
    }
public function getMD5 ( ) { if ( ! $ this -> md5 ) { $ this -> md5 = $ this -> media -> getHash ( 'md5' ) ; } return $ this -> md5 ; }
Returns the md5 checksum of the document

@return string
Returns the md5 checksum of the document