//
//   This file contains the C# code from Program 7.2 of
//   "Data Structures and Algorithms
//    with Object-Oriented Design Patterns in C#"
//   by Bruno R. Preiss.
//
//   Copyright (c) 2001--2002 by Bruno R. Preiss, P.Eng.  All rights reserved.
//
//   http://www.brpreiss.com/books/opus6/programs/pgm07_02.txt
//
public interface Cursor
{
    ComparableObject Datum { get; }
    void InsertAfter(ComparableObject obj);
    void InsertBefore(ComparableObject obj);
    void Withdraw();
}