public virtual void IAmPrinting(Checkout checkout)
{
Console.WriteLine($"Type: {checkout.GetType().Name}");
Console.WriteLine($"ToString(): {checkout.ToString()}");
}
public void RemoveExam(Checkout exam)
{
exams.Remove(exam);
}
public void RemoveTest(Checkout test)
{
tests.Remove(test);
}
public void AddTest(Checkout test)
{
tests.Add(test);
}