check method

@override bool check(String? value)

checks the input against the given conditions

Implementation

@override
bool check(String? value) {
  if (value == null) {
    return false;
  }
  int? parsedValue = int.tryParse(value);
  if(parsedValue == null){
    return false;
  }
  return parsedValue >= min && parsedValue <= max;
}