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

import edu.neu.ccs.demeter.*;
add: class TraceVisitor extends UniversalVisitor {
  protected int indent;
  public int get_indent() {{ return indent; }}
  public void set_indent(int new_indent)
    {{ indent = new_indent; }}
  public constructor TraceVisitor() {{ super(); }}
  public constructor TraceVisitor(int indent) {{
    super();
    set_indent(indent);
  }}
{{
    protected java.io.PrintWriter out = new java.io.PrintWriter(System.out, true);
    java.io.PrintWriter get_out()             { return out; }
    void set_out(java.io.PrintWriter new_out) { out = new_out; }
    TraceVisitor(java.io.PrintWriter out)     { set_out(out); }
    TraceVisitor(java.io.PrintStream out)
      { set_out(new java.io.PrintWriter(out, true)); }
  }}
  public void finish() {{ out.flush(); }}
  public void before(Main host) {{
    out.println("before Main");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Main host) {{
    out.println("after Main");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Cd_graph host) {{
    out.println("before Cd_graph");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Cd_graph host) {{
    out.println("after Cd_graph");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_adjacencies(Cd_graph source, Adjacency_Nlist dest) {{
    out.println("before -> Cd_graph, adjacencies, Adjacency_Nlist ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_adjacencies(Cd_graph source, Adjacency_Nlist dest) {{
    out.println("after -> Cd_graph, adjacencies, Adjacency_Nlist ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Adjacency host) {{
    out.println("before Adjacency");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Adjacency host) {{
    out.println("after Adjacency");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_source(Adjacency source, Vertex dest) {{
    out.println("before -> Adjacency, source, Vertex ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_source(Adjacency source, Vertex dest) {{
    out.println("after -> Adjacency, source, Vertex ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_ns(Adjacency source, Neighbors dest) {{
    out.println("before -> Adjacency, ns, Neighbors ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_ns(Adjacency source, Neighbors dest) {{
    out.println("after -> Adjacency, ns, Neighbors ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_supers(Adjacency source, SuperClasses dest) {{
    out.println("before -> Adjacency, supers, SuperClasses ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_supers(Adjacency source, SuperClasses dest) {{
    out.println("after -> Adjacency, supers, SuperClasses ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(SuperClasses host) {{
    out.println("before SuperClasses");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(SuperClasses host) {{
    out.println("after SuperClasses");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_superclass_comma_list(SuperClasses source, SuperClass_Comma_list dest) {{
    out.println("before -> SuperClasses, superclass_comma_list, SuperClass_Comma_list ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_superclass_comma_list(SuperClasses source, SuperClass_Comma_list dest) {{
    out.println("after -> SuperClasses, superclass_comma_list, SuperClass_Comma_list ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(SuperClass host) {{
    out.println("before SuperClass");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(SuperClass host) {{
    out.println("after SuperClass");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_super_name(SuperClass source, Ident dest) {{
    out.println("before -> SuperClass, super_name, Ident ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_super_name(SuperClass source, Ident dest) {{
    out.println("after -> SuperClass, super_name, Ident ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Neighbors host) {{
    out.println("before Neighbors");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Neighbors host) {{
    out.println("after Neighbors");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Neighbors_wc host) {{
    out.println("before Neighbors_wc");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Neighbors_wc host) {{
    out.println("after Neighbors_wc");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_construct_ns(Neighbors_wc source, Any_vertex_List dest) {{
    out.println("before -> Neighbors_wc, construct_ns, Any_vertex_List ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_construct_ns(Neighbors_wc source, Any_vertex_List dest) {{
    out.println("after -> Neighbors_wc, construct_ns, Any_vertex_List ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Construct_ns host) {{
    out.println("before Construct_ns");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Construct_ns host) {{
    out.println("after Construct_ns");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Alternat_ns host) {{
    out.println("before Alternat_ns");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Alternat_ns host) {{
    out.println("after Alternat_ns");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_alternat_ns(Alternat_ns source, Term_Bar_list dest) {{
    out.println("before -> Alternat_ns, alternat_ns, Term_Bar_list ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_alternat_ns(Alternat_ns source, Term_Bar_list dest) {{
    out.println("after -> Alternat_ns, alternat_ns, Term_Bar_list ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_common(Alternat_ns source, Common dest) {{
    out.println("before -> Alternat_ns, common, Common ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_common(Alternat_ns source, Common dest) {{
    out.println("after -> Alternat_ns, common, Common ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Common host) {{
    out.println("before Common");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Common host) {{
    out.println("after Common");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Any_vertex host) {{
    out.println("before Any_vertex");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Any_vertex host) {{
    out.println("after Any_vertex");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Vertex host) {{
    out.println("before Vertex");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Vertex host) {{
    out.println("after Vertex");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_vertex_name(Vertex source, Ident dest) {{
    out.println("before -> Vertex, vertex_name, Ident ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_vertex_name(Vertex source, Ident dest) {{
    out.println("after -> Vertex, vertex_name, Ident ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Syntax_vertex host) {{
    out.println("before Syntax_vertex");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Syntax_vertex host) {{
    out.println("after Syntax_vertex");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Regular_syntax host) {{
    out.println("before Regular_syntax");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Regular_syntax host) {{
    out.println("after Regular_syntax");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_string(Regular_syntax source, String dest) {{
    out.println("before -> Regular_syntax, string, String ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_string(Regular_syntax source, String dest) {{
    out.println("after -> Regular_syntax, string, String ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Opt_labeled_term host) {{
    out.println("before Opt_labeled_term");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Opt_labeled_term host) {{
    out.println("after Opt_labeled_term");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_vertex(Opt_labeled_term source, Term dest) {{
    out.println("before -> Opt_labeled_term, vertex, Term ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_vertex(Opt_labeled_term source, Term dest) {{
    out.println("after -> Opt_labeled_term, vertex, Term ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Regular host) {{
    out.println("before Regular");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Regular host) {{
    out.println("after Regular");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Labeled host) {{
    out.println("before Labeled");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Labeled host) {{
    out.println("after Labeled");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_label_name(Labeled source, Ident dest) {{
    out.println("before -> Labeled, label_name, Ident ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_label_name(Labeled source, Ident dest) {{
    out.println("after -> Labeled, label_name, Ident ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Term host) {{
    out.println("before Term");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Term host) {{
    out.println("after Term");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_vertex(Term source, Vertex dest) {{
    out.println("before -> Term, vertex, Vertex ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_vertex(Term source, Vertex dest) {{
    out.println("after -> Term, vertex, Vertex ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Normal host) {{
    out.println("before Normal");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Normal host) {{
    out.println("after Normal");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Optional_term host) {{
    out.println("before Optional_term");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Optional_term host) {{
    out.println("after Optional_term");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_opt(Optional_term source, Opt_labeled_term_Sandwich dest) {{
    out.println("before -> Optional_term, opt, Opt_labeled_term_Sandwich ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_opt(Optional_term source, Opt_labeled_term_Sandwich dest) {{
    out.println("after -> Optional_term, opt, Opt_labeled_term_Sandwich ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(PrintVisitor host) {{
    out.println("before PrintVisitor");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(PrintVisitor host) {{
    out.println("after PrintVisitor");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_indent(PrintVisitor source, int dest) {{
    out.println("before -> PrintVisitor, indent, int ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_indent(PrintVisitor source, int dest) {{
    out.println("after -> PrintVisitor, indent, int ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_needSpace(PrintVisitor source, boolean dest) {{
    out.println("before -> PrintVisitor, needSpace, boolean ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_needSpace(PrintVisitor source, boolean dest) {{
    out.println("after -> PrintVisitor, needSpace, boolean ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(CopyVisitor host) {{
    out.println("before CopyVisitor");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(CopyVisitor host) {{
    out.println("after CopyVisitor");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_copy(CopyVisitor source, Object dest) {{
    out.println("before -> CopyVisitor, copy, Object ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_copy(CopyVisitor source, Object dest) {{
    out.println("after -> CopyVisitor, copy, Object ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(SubgraphVisitor host) {{
    out.println("before SubgraphVisitor");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(SubgraphVisitor host) {{
    out.println("after SubgraphVisitor");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_is_equal(SubgraphVisitor source, boolean dest) {{
    out.println("before -> SubgraphVisitor, is_equal, boolean ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_is_equal(SubgraphVisitor source, boolean dest) {{
    out.println("after -> SubgraphVisitor, is_equal, boolean ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(EqualVisitor host) {{
    out.println("before EqualVisitor");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(EqualVisitor host) {{
    out.println("after EqualVisitor");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_is_equal(EqualVisitor source, boolean dest) {{
    out.println("before -> EqualVisitor, is_equal, boolean ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_is_equal(EqualVisitor source, boolean dest) {{
    out.println("after -> EqualVisitor, is_equal, boolean ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(DisplayVisitor host) {{
    out.println("before DisplayVisitor");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(DisplayVisitor host) {{
    out.println("after DisplayVisitor");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_indent(DisplayVisitor source, int dest) {{
    out.println("before -> DisplayVisitor, indent, int ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_indent(DisplayVisitor source, int dest) {{
    out.println("after -> DisplayVisitor, indent, int ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(TraceVisitor host) {{
    out.println("before TraceVisitor");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(TraceVisitor host) {{
    out.println("after TraceVisitor");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_indent(TraceVisitor source, int dest) {{
    out.println("before -> TraceVisitor, indent, int ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_indent(TraceVisitor source, int dest) {{
    out.println("after -> TraceVisitor, indent, int ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(UniversalVisitor host) {{
    out.println("before UniversalVisitor");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(UniversalVisitor host) {{
    out.println("after UniversalVisitor");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Adjacency_Nlist host) {{
    out.println("before Adjacency_Nlist");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Adjacency_Nlist host) {{
    out.println("after Adjacency_Nlist");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_first(Adjacency_Nlist source, Nonempty_Adjacency_Nlist dest) {{
    out.println("before -> Adjacency_Nlist, first, Nonempty_Adjacency_Nlist ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_first(Adjacency_Nlist source, Nonempty_Adjacency_Nlist dest) {{
    out.println("after -> Adjacency_Nlist, first, Nonempty_Adjacency_Nlist ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(SuperClass_Comma_list host) {{
    out.println("before SuperClass_Comma_list");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(SuperClass_Comma_list host) {{
    out.println("after SuperClass_Comma_list");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_first(SuperClass_Comma_list source, Nonempty_SuperClass_Comma_list dest) {{
    out.println("before -> SuperClass_Comma_list, first, Nonempty_SuperClass_Comma_list ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_first(SuperClass_Comma_list source, Nonempty_SuperClass_Comma_list dest) {{
    out.println("after -> SuperClass_Comma_list, first, Nonempty_SuperClass_Comma_list ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Any_vertex_List host) {{
    out.println("before Any_vertex_List");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Any_vertex_List host) {{
    out.println("after Any_vertex_List");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_first(Any_vertex_List source, Nonempty_Any_vertex_List dest) {{
    out.println("before -> Any_vertex_List, first, Nonempty_Any_vertex_List ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_first(Any_vertex_List source, Nonempty_Any_vertex_List dest) {{
    out.println("after -> Any_vertex_List, first, Nonempty_Any_vertex_List ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Term_Bar_list host) {{
    out.println("before Term_Bar_list");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Term_Bar_list host) {{
    out.println("after Term_Bar_list");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_first(Term_Bar_list source, Nonempty_Term_Bar_list dest) {{
    out.println("before -> Term_Bar_list, first, Nonempty_Term_Bar_list ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_first(Term_Bar_list source, Nonempty_Term_Bar_list dest) {{
    out.println("after -> Term_Bar_list, first, Nonempty_Term_Bar_list ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Opt_labeled_term_Sandwich host) {{
    out.println("before Opt_labeled_term_Sandwich");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Opt_labeled_term_Sandwich host) {{
    out.println("after Opt_labeled_term_Sandwich");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_first(Opt_labeled_term_Sandwich source, Syntax_vertex_List dest) {{
    out.println("before -> Opt_labeled_term_Sandwich, first, Syntax_vertex_List ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_first(Opt_labeled_term_Sandwich source, Syntax_vertex_List dest) {{
    out.println("after -> Opt_labeled_term_Sandwich, first, Syntax_vertex_List ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_inner(Opt_labeled_term_Sandwich source, Opt_labeled_term dest) {{
    out.println("before -> Opt_labeled_term_Sandwich, inner, Opt_labeled_term ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_inner(Opt_labeled_term_Sandwich source, Opt_labeled_term dest) {{
    out.println("after -> Opt_labeled_term_Sandwich, inner, Opt_labeled_term ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_second(Opt_labeled_term_Sandwich source, Syntax_vertex_List dest) {{
    out.println("before -> Opt_labeled_term_Sandwich, second, Syntax_vertex_List ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_second(Opt_labeled_term_Sandwich source, Syntax_vertex_List dest) {{
    out.println("after -> Opt_labeled_term_Sandwich, second, Syntax_vertex_List ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Syntax_vertex_List host) {{
    out.println("before Syntax_vertex_List");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Syntax_vertex_List host) {{
    out.println("after Syntax_vertex_List");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_first(Syntax_vertex_List source, Nonempty_Syntax_vertex_List dest) {{
    out.println("before -> Syntax_vertex_List, first, Nonempty_Syntax_vertex_List ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_first(Syntax_vertex_List source, Nonempty_Syntax_vertex_List dest) {{
    out.println("after -> Syntax_vertex_List, first, Nonempty_Syntax_vertex_List ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Nonempty_Adjacency_Nlist host) {{
    out.println("before Nonempty_Adjacency_Nlist");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Nonempty_Adjacency_Nlist host) {{
    out.println("after Nonempty_Adjacency_Nlist");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_it(Nonempty_Adjacency_Nlist source, Adjacency dest) {{
    out.println("before -> Nonempty_Adjacency_Nlist, it, Adjacency ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_it(Nonempty_Adjacency_Nlist source, Adjacency dest) {{
    out.println("after -> Nonempty_Adjacency_Nlist, it, Adjacency ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_next(Nonempty_Adjacency_Nlist source, Nonempty_Adjacency_Nlist dest) {{
    out.println("before -> Nonempty_Adjacency_Nlist, next, Nonempty_Adjacency_Nlist ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_next(Nonempty_Adjacency_Nlist source, Nonempty_Adjacency_Nlist dest) {{
    out.println("after -> Nonempty_Adjacency_Nlist, next, Nonempty_Adjacency_Nlist ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Nonempty_SuperClass_Comma_list host) {{
    out.println("before Nonempty_SuperClass_Comma_list");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Nonempty_SuperClass_Comma_list host) {{
    out.println("after Nonempty_SuperClass_Comma_list");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_it(Nonempty_SuperClass_Comma_list source, SuperClass dest) {{
    out.println("before -> Nonempty_SuperClass_Comma_list, it, SuperClass ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_it(Nonempty_SuperClass_Comma_list source, SuperClass dest) {{
    out.println("after -> Nonempty_SuperClass_Comma_list, it, SuperClass ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_next(Nonempty_SuperClass_Comma_list source, Nonempty_SuperClass_Comma_list dest) {{
    out.println("before -> Nonempty_SuperClass_Comma_list, next, Nonempty_SuperClass_Comma_list ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_next(Nonempty_SuperClass_Comma_list source, Nonempty_SuperClass_Comma_list dest) {{
    out.println("after -> Nonempty_SuperClass_Comma_list, next, Nonempty_SuperClass_Comma_list ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Nonempty_Any_vertex_List host) {{
    out.println("before Nonempty_Any_vertex_List");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Nonempty_Any_vertex_List host) {{
    out.println("after Nonempty_Any_vertex_List");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_it(Nonempty_Any_vertex_List source, Any_vertex dest) {{
    out.println("before -> Nonempty_Any_vertex_List, it, Any_vertex ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_it(Nonempty_Any_vertex_List source, Any_vertex dest) {{
    out.println("after -> Nonempty_Any_vertex_List, it, Any_vertex ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_next(Nonempty_Any_vertex_List source, Nonempty_Any_vertex_List dest) {{
    out.println("before -> Nonempty_Any_vertex_List, next, Nonempty_Any_vertex_List ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_next(Nonempty_Any_vertex_List source, Nonempty_Any_vertex_List dest) {{
    out.println("after -> Nonempty_Any_vertex_List, next, Nonempty_Any_vertex_List ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Nonempty_Term_Bar_list host) {{
    out.println("before Nonempty_Term_Bar_list");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Nonempty_Term_Bar_list host) {{
    out.println("after Nonempty_Term_Bar_list");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_it(Nonempty_Term_Bar_list source, Term dest) {{
    out.println("before -> Nonempty_Term_Bar_list, it, Term ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_it(Nonempty_Term_Bar_list source, Term dest) {{
    out.println("after -> Nonempty_Term_Bar_list, it, Term ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_next(Nonempty_Term_Bar_list source, Nonempty_Term_Bar_list dest) {{
    out.println("before -> Nonempty_Term_Bar_list, next, Nonempty_Term_Bar_list ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_next(Nonempty_Term_Bar_list source, Nonempty_Term_Bar_list dest) {{
    out.println("after -> Nonempty_Term_Bar_list, next, Nonempty_Term_Bar_list ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before(Nonempty_Syntax_vertex_List host) {{
    out.println("before Nonempty_Syntax_vertex_List");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after(Nonempty_Syntax_vertex_List host) {{
    out.println("after Nonempty_Syntax_vertex_List");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_it(Nonempty_Syntax_vertex_List source, Syntax_vertex dest) {{
    out.println("before -> Nonempty_Syntax_vertex_List, it, Syntax_vertex ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_it(Nonempty_Syntax_vertex_List source, Syntax_vertex dest) {{
    out.println("after -> Nonempty_Syntax_vertex_List, it, Syntax_vertex ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void before_next(Nonempty_Syntax_vertex_List source, Nonempty_Syntax_vertex_List dest) {{
    out.println("before -> Nonempty_Syntax_vertex_List, next, Nonempty_Syntax_vertex_List ");
    indent++;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
  public void after_next(Nonempty_Syntax_vertex_List source, Nonempty_Syntax_vertex_List dest) {{
    out.println("after -> Nonempty_Syntax_vertex_List, next, Nonempty_Syntax_vertex_List ");
    indent--;
    for (int i = 0; i < indent; i++) out.print(" ");
  }}
{{  void universal_trv0_bef(UniversalVisitor _v_) {
    super.universal_trv0_bef(_v_);
  }
}}
{{  void universal_trv0_aft(UniversalVisitor _v_) {
    super.universal_trv0_aft(_v_);
  }
}}
{{  void universal_trv0(UniversalVisitor _v_) {
    universal_trv0_bef(_v_);
    super.universal_trv0(_v_);
    universal_trv0_aft(_v_);
  }
}}
}