/**
  * Convert file paths inside "src" attributes to insert tags.
  *
  * @param string $data The markup string.
  *
  * @return string The markup with file paths converted to insert tags
  */
 public static function srcToInsertTag($data)
 {
     if (self::isStringUtilAvailable()) {
         return StringUtil::srcToInsertTag($data);
     }
     return \Contao\String::srcToInsertTag($data);
 }