core:
import edu.neu.ccs.demeter.dj.*;
import java.lang.*;
import java.util.*;

import edu.neu.ccs.demeter.*;
add: class PrintAdjVisitor extends Visitor {
  public constructor PrintAdjVisitor() {{
    super();
  }}
  public static PrintAdjVisitor parse(java.io.Reader in)
    throws ParseException
  {{ return new Parser(in)._PrintAdjVisitor(); }}
  public static PrintAdjVisitor parse(java.io.InputStream in)
    throws ParseException
  {{ return new Parser(in)._PrintAdjVisitor(); }}
  public static PrintAdjVisitor parse(String s) {{
    try { return parse(new java.io.StringReader(s)); }
    catch (ParseException e) {
      throw new RuntimeException(e.toString());
    }
  }}
{{
  void before (Adjacency host) {
    Adjacency p = host.get_myparent();
    if (p!=null)
      System.out.println(p.get_source().get_vertex_name());
  }
}}
{{  void universal_trv0_bef(UniversalVisitor _v_) {
    ((UniversalVisitor) _v_).before(this);
  }
}}
{{  void universal_trv0_aft(UniversalVisitor _v_) {
    ((UniversalVisitor) _v_).after(this);
  }
}}
{{  void universal_trv0(UniversalVisitor _v_) {
    universal_trv0_bef(_v_);
    universal_trv0_aft(_v_);
  }
}}
}