// (c) MIT 2003.  All rights reserved.

// -*-Mode: Java-*- 
// $Id: Command.java,v 1.2 2003/03/06 00:40:48 moltmans Exp $
// Command.java -- 
// Author: Michael Oltmans <moltmans@ai.mit.edu> 
// Created: <Fri Feb 25 19:17:37 2000> 
// Time-stamp: <2000-02-25 19:35:24 moltmans> 
package rec.core;

import rec.sys.*;

/**
 * This is used for simple commands like entering editing modes etc...
 **/
public interface Command
{
  public void performAction( Surface s, Object arg );
  public void performUndo( Surface s, Object arg );
}
