code: /*
   * Pair.java -- utilities class for manipulating Strings
   * Eddie Kohler
   *
   * Copyright (c) 2000 Massachusetts Institute of Technology
   * Copyright (c) 2001 International Computer Science Institute
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, subject to the conditions
   * listed in the Click LICENSE file. These conditions include: you must
   * preserve this copyright notice, and you cannot mention the copyright
   * holders in advertising related to the Software without their permission.
   * The Software is provided WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED. This
   * notice is a summary of the Click LICENSE file; the license in that file is
   * legally binding.
   */
  
  /**
   * Utility routines.
   * 
   * @author Eddie Kohler
   */
  
  public class Pair {
  
      public Object fst;
      public Object snd;
  
      public Pair() {
  	fst = null;
  	snd = null;
      }
  
      public Pair(Object a, Object b) {
  	fst = a;
  	snd = b;
      }
  
  }
  