integer method

int? integer(
  1. String key, {
  2. int min = 1,
})

Implementation

int? integer(String key, {int min = 1}) {
  final value = map[key];
  if (value == null) {
    return null;
  }
  if (value is int && value >= min) {
    return value;
  }
  throw valueError(
    key,
    'expected a whole number of at least $min, found ${describe(value)}.',
  );
}