addRange method
Example: var regex = FluentRegex() .characterSet(CharacterSet().addRange('k', 'p').addRange('2', '6')); expect(regex.hasMatch('l'), true); expect(regex.hasMatch('5'), true); expect(regex.hasMatch('a'), false);
Implementation
CharacterSet addRange(String from, String to) {
String range = '$from-$to';
_sets.add(range);
return this;
}