try {
CssTok tok = consumeWS(local, consumeWS);
if (tok != null) {
if (tok instanceof NumberTok) {
// ok
NumberTok numberTok = (NumberTok) tok;
double number = numberTok.getVal();
if (rule instanceof CSSRangedDoubleType) {
CSSRangedDoubleType ranged = (CSSRangedDoubleType) rule;
double min = ranged.getFrom();
double max = ranged.getTo();