public class RBTItem extends Item  {
  private boolean isRed;
  public RBTItem(Object k, Object elem, boolean color)  {
    super(k, elem);
    isRed = color;
  }
  public boolean isRed()  {return isRed;}
  public void makeRed()  {isRed = true;}
  public void makeBlack()  {isRed = false;}
  public void setColor(boolean color)  {isRed = color;}
}