public interface LagerLyd extends HarAlder {
  public void lagLyd();
}
/*
public interface Grensenitt1 extends Grensesnitt2 {}
public class Klasse1 implements Grensenitt1 {}
public class Klasse1 extends Klasse2 {}

public class Klasse1 extends Klasse2 implements Grensenitt1, Grensesnitt2 {}
*/