protected function _showWayf(EngineBlock_Saml2_AuthnRequestAnnotationDecorator $request, array $candidateIdpEntityIds)
 {
     // Post to the 'continueToIdp' service
     $action = $this->_server->getUrl('continueToIdP');
     $serviceProvider = $this->_server->getRepository()->fetchServiceProviderByEntityId($request->getIssuer());
     $idpList = $this->_transformIdpsForWAYF($candidateIdpEntityIds, $request->isDebugRequest());
     $output = $this->_server->renderTemplate('discover', array('preselectedIdp' => $this->_server->getCookie('selectedIdp'), 'action' => $action, 'ID' => $request->getId(), 'idpList' => $idpList, 'metaDataSP' => $serviceProvider));
     $this->_server->sendOutput($output);
 }