parse static method
Implementation
static CSSMax? parse(String? s) {
if (s == null) return null;
s = s.trim().toLowerCase();
if (s.isEmpty) return null;
var match = pattern.firstMatch(s);
if (match == null) return null;
var call = match.group(1)!;
var args = call.split(patternArgsDelimiter);
args = _normalizeArgs(args);
if (args.isNotEmpty) {
return CSSMax(args);
}
return null;
}