between static method
check field is between given value
Implementation
static bool between(Map<String, dynamic> data, dynamic value, String values) {
  List<String> parts = values.toString().split(',');
  num value1 = num.parse(parts[0]);
  num value2 = num.parse(parts[1]);
  value = num.parse(value.toString());
  if (value1 < value2) {
    return value >= value1 && value <= value2;
  }
  return value >= value2 && value <= value1;
}