/**
  * @param Request $httpRequest
  * @return AuthnRequest
  */
 public static function createUnsignedFromHttpRequest(Request $httpRequest)
 {
     return AuthnRequest::createUnsigned(self::createAuthnRequestFromHttpRequest($httpRequest), $httpRequest->get(AuthnRequest::PARAMETER_REQUEST), $httpRequest->get(AuthnRequest::PARAMETER_RELAY_STATE));
 }