/**
  * Generates markup for the Android pinicon
  *
  * @param SiteConfig $config
  * @param SiteTree $owner
  * @param $metadata
  *
  * @return void
  */
 protected function GenerateAndroidPinicon(SiteConfig $config, SiteTree $owner, &$metadata)
 {
     // header
     $metadata .= $owner->MarkupComment('Android Pinned Icon');
     //
     if ($config->fetchAndroidPiniconThemeColor()) {
         $metadata .= $owner->MarkupMeta('theme-color', $config->fetchAndroidPiniconThemeColor());
     }
     //
     $metadata .= $owner->MarkupLink('manifest', '/manifest.json');
 }