public override void PlayIsStartedEventHandler(object sender, PlayIsStartedEventArgs args) => Console.WriteLine($"Violinist {Name} plays composition #{args.Song}: La-la!");
public override void PlayIsStartedEventHandler(object sender, PlayIsStartedEventArgs args) => Console.WriteLine($"Hornist {Name} starts playing composition #{args.Song}: Du-du-du!");
public abstract void PlayIsStartedEventHandler(object sender, PlayIsStartedEventArgs args);