public void ReceiveContents(Jewels safeContents)
{
returnedContents = safeContents;
Console.WriteLine("Thank you for returning my jewels! " + returnedContents.Sparkle());
}
override public void ReturnContents(Jewels safeContents, Owner owner)
{
stolenJewels = safeContents;
Console.WriteLine("I'm stealing the contents! " + stolenJewels.Sparkle());
}