public function renderJsContainerGroundOverlays(Map $map)
    {
        $output = array();

        foreach ($map->getGroundOverlays() as $groundOverlay) {
            $output[] = sprintf(
                '%s.ground_overlays.%s = %s',
                $this->getJsContainerName($map),
                $groundOverlay->getJavascriptVariable(),
                $this->groundOverlayHelper->render($groundOverlay, $map)
            );
        }

        return implode('', $output);
    }