public interface iiInterface : Object {
    //  private abstract int _age
    public abstract int foo { get; protected set; }

    public abstract void print();
}

public class ClassA : Object, iiInterface {
    public int foo { get; protected set; }

    public ClassA() {
        this.foo = 2;
    }

    public void print() {
        stdout.printf("From A\n");
    }
}

public class ClassB : ClassA/*, iiInterface*/ {
    public void print() {
        stdout.printf("From B\n");
    }
}

int main (string[] args)
{
    var bar = new ClassB();
    bar.print();

    return 0;
}


[Print]
void prin(string s){
    stdout.printf(s + "\n");
}