import EDU.neu.ccs.demeter.dj.Visitor;

public class MyVisitor extends Visitor {
  public void start() { System.out.println("begin me"); }
  public void finish() { System.out.println("end me"); }

  public void before(A o) { System.out.println("me before A"); }
  public void after(A o)  { System.out.println("me after A"); }

  public void before(B o) { System.out.println("me before B"); }
  public void after(B o)  { System.out.println("me after B"); }

  public void before(C o) { System.out.println("me before C: " + o.s); }
  public void after(C o)  { System.out.println("me after C: " + o.s); }

  public void before(X o) { System.out.println("me before X"); }
  public void after(X o)  { System.out.println("me after X"); }
}