public void visitDolphin(Dolphin dolphin) => Console.WriteLine("Walked on water a little and disappeared");
public void visitDolphin(Dolphin dolphin) => dolphin.speak();
public void visitDolphin(Dolphin dolphin) => Console.WriteLine("Walked on water a little and disappeared");
public void visitDolphin(Dolphin dolphin) => dolphin.speak();