// creation
  final frPhone = PhoneNumber.fromNational('fr', '655 5705 76');
  final frPhone1 = PhoneNumber.fromRaw('+33 655 5705 76');
  final frPhone2 = PhoneNumber.fromIsoCode('fr', '655 5705 76');
  final frPhone3 = PhoneNumber.fromCountryCode('33', '655 5705 76');
  final frPhone4 = PhoneNumber.fromIsoCode('fr', '0655 5705 76');
  final allSame = frPhone == frPhone1 &&
      frPhone == frPhone2 &&
      frPhone == frPhone3 &&
      frPhone == frPhone4;
  print('allSame: $allSame'); // true

  // validation
  final valid = frPhone1.validate();
  final validMobile = frPhone1.validate(type: PhoneNumberType.mobile);
  final validFixed = frPhone1.validate(type: PhoneNumberType.fixedLine);
  print('valid: $valid'); // true
  print('valid mobile: $validMobile'); // true
  print('valid fixed line: $validFixed'); // false

  // changing the country

  final esPhone =
      frPhone1.rebuildWith(isoCode: 'ES'); // will reparse the nsn for new iso
  print('new country code: ' + esPhone.countryCode); // 34 // '+34655570576'

  // utils
  final text = 'hey my phone number is: +33 939 876 218';
  final found = PhoneNumber.findPotentialPhoneNumbers(text);
  print('found: ' + (found.first.group(0) ?? ''));

  final phoneNumber = PhoneNumber.fromIsoCode('US', '2025550119');
  final formattedNsn = phoneNumber.getFormattedNsn();
  print('formatted: $formattedNsn'); // 202-555-0119

  final first = PhoneNumber.fromRaw('+33 655 5705 00');
  final last = PhoneNumber.fromRaw('+33 655 5705 03');
  final range = PhoneNumber.getRange(first, last);

  print('Count: ${range.count}');
  print('Expand: ${range.expandRange().join(',')}');

  if (first > last) {
    print("this shouldn't be.");
  }

  final one = PhoneNumber.fromRaw('+33 655 5705 01');
  final two = PhoneNumber.fromRaw('+33 655 5705 02');

  if (one.isAdjacentTo(two)) {
    print('We are together');
  }
  if (one.isSequentialTo(two)) {
    print('$two comes after $one');
  }

  /// treat the phone no. like an int
  final three = two + 1;
  print('Its still a phone No. $three');
  two - 1 == one;
  final another = one + 2;
  print('$another == $three');