/**
  * Renders the map javascript info window
  *
  * @param Ivory\GoogleMapBundle\Model\Map $map
  * @return string HTML output
  */
 public function renderInfoWindows(Map $map)
 {
     $html = array();
     foreach ($map->getInfoWindows() as $infoWindow) {
         $html[] = $this->infoWindowHelper->render($infoWindow);
         if ($infoWindow->isOpen()) {
             $html[] = $this->infoWindowHelper->renderOpen($infoWindow, $map);
         }
     }
     return implode('', $html);
 }