private static boolean isValuelessAttribute(String attribName){
  boolean valueless=VALUELESS_ATTRIB_NAMES.contains(Strings.lower(attribName));
  return valueless;
}

private static boolean isValuelessAttribute ( String attribName ) { boolean valueless = VALUELESS_ATTRIB_NAMES . contains ( Strings . lower ( attribName ) ) ; return valueless ; }
can the attribute appear in html without a value .
