/**
* Creates a new ParameterizedHeader with $name.
*
* @param string $name
* @param Swift_Mime_HeaderEncoder $encoder
* @param Swift_Encoder $paramEncoder, optional
* @param Swift_Mime_Grammar $grammar
*/
public function __construct($name, Swift_Mime_HeaderEncoder $encoder, Swift_Encoder $paramEncoder = null, Swift_Mime_Grammar $grammar)
{
parent::__construct($name, $encoder, $grammar);
$this->_paramEncoder = $paramEncoder;
}