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

import edu.neu.ccs.demeter.*;
add: class Kernel_Sandwich {
  protected Syntax_vertex_List first;
  public Syntax_vertex_List get_first() {{ return first; }}
  public void set_first(Syntax_vertex_List new_first)
    {{ first = new_first; }}
  protected Kernel inner;
  public Kernel get_inner() {{ return inner; }}
  public void set_inner(Kernel new_inner)
    {{ inner = new_inner; }}
  protected Syntax_vertex_List second;
  public Syntax_vertex_List get_second() {{ return second; }}
  public void set_second(Syntax_vertex_List new_second)
    {{ second = new_second; }}
  public constructor Kernel_Sandwich() {{ super(); }}
  public constructor Kernel_Sandwich(Syntax_vertex_List first, Kernel inner, Syntax_vertex_List second) {{
    super();
    set_first(first);
    set_inner(inner);
    set_second(second);
  }}
  public static Kernel_Sandwich parse(java.io.Reader in)
    throws ParseException
  {{ return new Parser(in)._Kernel_Sandwich(); }}
  public static Kernel_Sandwich parse(java.io.InputStream in)
    throws ParseException
  {{ return new Parser(in)._Kernel_Sandwich(); }}
  public static Kernel_Sandwich parse(String s) {{
    try { return parse(new java.io.StringReader(s)); }
    catch (ParseException e) {
      throw new RuntimeException(e.toString());
    }
  }}
{{  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_);
    ((UniversalVisitor) _v_).before_first(this, first);
    first.universal_trv0(_v_);
    ((UniversalVisitor) _v_).after_first(this, first);
    ((UniversalVisitor) _v_).before_inner(this, inner);
    inner.universal_trv0(_v_);
    ((UniversalVisitor) _v_).after_inner(this, inner);
    ((UniversalVisitor) _v_).before_second(this, second);
    second.universal_trv0(_v_);
    ((UniversalVisitor) _v_).after_second(this, second);
    universal_trv0_aft(_v_);
  }
}}
{{  void __trav_display_Cd_graph_trv_bef(DisplayVisitor __v0) {
    ((DisplayVisitor) __v0).before(this);
  }
}}
{{  void __trav_display_Cd_graph_trv_aft(DisplayVisitor __v0) {
    ((DisplayVisitor) __v0).after(this);
  }
}}
{{  void __trav_display_Cd_graph_trv(DisplayVisitor __v0) {
    __trav_display_Cd_graph_trv_bef(__v0);
    ((DisplayVisitor) __v0).before_first(this, first);
    first.__trav_display_Cd_graph_trv(__v0);
    ((UniversalVisitor) __v0).after_first(this, first);
    ((DisplayVisitor) __v0).before_inner(this, inner);
    inner.__trav_display_Cd_graph_trv(__v0);
    ((UniversalVisitor) __v0).after_inner(this, inner);
    ((DisplayVisitor) __v0).before_second(this, second);
    second.__trav_display_Cd_graph_trv(__v0);
    ((UniversalVisitor) __v0).after_second(this, second);
    __trav_display_Cd_graph_trv_aft(__v0);
  }
}}
}