class Bicycle {
  int cadence;
  //Speed is now a Private Variable and Read Only
  int _speed = 0;
  //Speed to getter Class
  int get speed => _speed;

  int gear;

  //Bicycle Constructor
  Bicycle(this.cadence, this.gear);

  //Apply Brake Method
  void applyBrake(int decrement) {
    _speed -= decrement;
  }

  //Speed Up Method
  void speedUp(int increment) {
    _speed += increment;
  }

  //String Method for Better Output
  @override
  String toString() => 'Bicycle: $speed mph';
}

//Dart's Main Method
void main() {
  var bike = Bicycle(2, 1);
  print(bike);
}