/**
  * Download client as XML file
  *
  * @return \Zend\Http\Response Response with downloadable XML content
  */
 public function exportAction()
 {
     $document = $this->_currentClient->toDomDocument();
     if (\Library\Application::isDevelopment()) {
         $document->forceValid();
     }
     $filename = $document->getFilename();
     $xml = $document->saveXml();
     $response = $this->getResponse();
     $response->getHeaders()->addHeaders(array('Content-Type' => 'text/xml; charset="utf-8"', 'Content-Disposition' => "attachment; filename=\"{$filename}\"", 'Content-Length' => strlen($xml)));
     $response->setContent($xml);
     return $response;
 }