/**
* Sets the ETag value.
*
* @param string|null $etag The ETag unique identifier or null to remove the header
* @param bool $weak Whether you want a weak ETag or not
*
* @return Response
*
* @api
*/
public function setEtag($etag = null, $weak = false)
{
return parent::setEtag($etag, $weak);
}
