generate method Null safety

String generate(
  1. {bool useFormat = false}
)

Implementation

static String generate({bool useFormat = false}) {
  var numbers = '';

  for (var i = 0; i < 12; i += 1) {
    numbers += Random().nextInt(9).toString();
  }

  numbers += _verifierDigit(numbers).toString();
  numbers += _verifierDigit(numbers).toString();

  return (useFormat ? format(numbers) : numbers);
}