code: private static Set<String>  parseRequiredFormats(String val)
     {
        TextScanner      scan = new TextScanner(val);
        HashSet<String>  result = new HashSet<>();
  
        while (!scan.empty())
        {
           String mimetype = scan.nextToken();
           result.add(mimetype);
           scan.skipWhitespace();
        }
        return result;
     }
docs: supported if we are to render this element