/**
  * Updates metadata with icons.
  *
  * @param SiteConfig $config
  * @param SiteTree $owner
  * @param $metadata
  *
  * @return void
  */
 public function updateMetadata(SiteConfig $config, SiteTree $owner, &$metadata)
 {
     //// HTML4 Favicon
     // @todo Perhaps create dynamic image, but just use favicon.ico for now
     //// Create Favicons
     $HTML5Favicon = $config->HTML5Favicon();
     $IOSPinicon = $config->IOSPinicon();
     $AndroidPinicon = $config->AndroidPinicon();
     $WindowsPinicon = $config->WindowsPinicon();
     //// iOS Pinicon
     if ($IOSPinicon->exists()) {
         $this->GenerateIOSPinicon($config, $owner, $metadata, $IOSPinicon);
     }
     //// HTML5 Favicon
     if ($HTML5Favicon->exists()) {
         $this->GenerateHTML5Favicon($owner, $metadata, $HTML5Favicon);
     }
     //// Android Pinicon Manifest
     if ($AndroidPinicon->exists()) {
         $this->GenerateAndroidPinicon($config, $owner, $metadata);
     }
     //// Windows Pinicon Manifest
     if ($WindowsPinicon->exists()) {
         $this->GenerateWindowsPinicon($config, $owner, $metadata, $WindowsPinicon);
     }
 }