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

import edu.neu.ccs.demeter.*;
add: class EqualVisitor extends UniversalVisitor {
  protected boolean is_equal = {{ true }};  public boolean get_is_equal() {{ return is_equal; }}
  public void set_is_equal(boolean new_is_equal)
    {{ is_equal = new_is_equal; }}
  public constructor EqualVisitor() {{ super(); }}
  public constructor EqualVisitor(boolean is_equal) {{
    super();
    set_is_equal(is_equal);
  }}
{{
    private java.util.Stack history = new java.util.Stack();
    public EqualVisitor(Object obj) {
      history.push(obj);
    }
  }}
  public void before(Main host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_globalimports(Cd_graph source, GlobalImports dest) {{
    if (is_equal) {
      Cd_graph obj = (Cd_graph) history.peek();
      Object temp1 = obj.get_globalimports();
      if(temp1==null) { is_equal = false; return; }
      history.push(temp1);
    }
  }}
  public void after_globalimports(Cd_graph source, GlobalImports dest) {{
    if (is_equal) history.pop();
  }}
  public void before_adjacencies(Cd_graph source, Adjacency_Nlist dest) {{
    if (is_equal) {
      Cd_graph obj = (Cd_graph) history.peek();
      Object temp2 = obj.get_adjacencies();
      if(temp2==null) { is_equal = false; return; }
      history.push(temp2);
    }
  }}
  public void after_adjacencies(Cd_graph source, Adjacency_Nlist dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Cd_graph host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_imports(GlobalImports source, Import_SList dest) {{
    if (is_equal) {
      GlobalImports obj = (GlobalImports) history.peek();
      Object temp3 = obj.get_imports();
      if(temp3==null) { is_equal = false; return; }
      history.push(temp3);
    }
  }}
  public void after_imports(GlobalImports source, Import_SList dest) {{
    if (is_equal) history.pop();
  }}
  public void before(GlobalImports host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_packagename(Import source, PackageName dest) {{
    if (is_equal) {
      Import obj = (Import) history.peek();
      Object temp4 = obj.get_packagename();
      if(temp4==null) { is_equal = false; return; }
      history.push(temp4);
    }
  }}
  public void after_packagename(Import source, PackageName dest) {{
    if (is_equal) history.pop();
  }}
  public void before_importallclasses(Import source, ImportAllClasses dest) {{
    if (is_equal) {
      Import obj = (Import) history.peek();
      Object temp5 = obj.get_importallclasses();
      if(temp5==null) { is_equal = false; return; }
      history.push(temp5);
    }
  }}
  public void after_importallclasses(Import source, ImportAllClasses dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Import host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before(ImportAllClasses host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_first(PackageName source, Nonempty_PackageName dest) {{
    if (is_equal) {
      PackageName obj = (PackageName) history.peek();
      Object temp6 = obj.get_first();
      if(temp6==null) { is_equal = false; return; }
      history.push(temp6);
    }
  }}
  public void after_first(PackageName source, Nonempty_PackageName dest) {{
    if (is_equal) history.pop();
  }}
  public void before(PackageName host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_source(Adjacency source, Vertex dest) {{
    if (is_equal) {
      Adjacency obj = (Adjacency) history.peek();
      Object temp7 = obj.get_source();
      if(temp7==null) { is_equal = false; return; }
      history.push(temp7);
    }
  }}
  public void after_source(Adjacency source, Vertex dest) {{
    if (is_equal) history.pop();
  }}
  public void before_parameters(Adjacency source, Vertex_Comma_list dest) {{
    if (is_equal) {
      Adjacency obj = (Adjacency) history.peek();
      Object temp8 = obj.get_parameters();
      if(temp8==null) { is_equal = false; return; }
      history.push(temp8);
    }
  }}
  public void after_parameters(Adjacency source, Vertex_Comma_list dest) {{
    if (is_equal) history.pop();
  }}
  public void before_ns(Adjacency source, Neighbors dest) {{
    if (is_equal) {
      Adjacency obj = (Adjacency) history.peek();
      Object temp9 = obj.get_ns();
      if(temp9==null) { is_equal = false; return; }
      history.push(temp9);
    }
  }}
  public void after_ns(Adjacency source, Neighbors dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Adjacency host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before(Neighbors host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_construct_ns(Neighbors_wc source, Any_vertex_List dest) {{
    if (is_equal) {
      Neighbors_wc obj = (Neighbors_wc) history.peek();
      Object temp10 = obj.get_construct_ns();
      if(temp10==null) { is_equal = false; return; }
      history.push(temp10);
    }
  }}
  public void after_construct_ns(Neighbors_wc source, Any_vertex_List dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Neighbors_wc host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before(Construct_ns host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_alternat_ns(Alternat_ns source, Term_Bar_list dest) {{
    if (is_equal) {
      Alternat_ns obj = (Alternat_ns) history.peek();
      Object temp11 = obj.get_alternat_ns();
      if(temp11==null) { is_equal = false; return; }
      history.push(temp11);
    }
  }}
  public void after_alternat_ns(Alternat_ns source, Term_Bar_list dest) {{
    if (is_equal) history.pop();
  }}
  public void before_common(Alternat_ns source, Common dest) {{
    if (is_equal) {
      Alternat_ns obj = (Alternat_ns) history.peek();
      Object temp12 = obj.get_common();
      if(temp12==null) { is_equal = false; return; }
      history.push(temp12);
    }
  }}
  public void after_common(Alternat_ns source, Common dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Alternat_ns host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before(Common host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_sandwiched(Repetit_n source, Kernel_Sandwich dest) {{
    if (is_equal) {
      Repetit_n obj = (Repetit_n) history.peek();
      Object temp13 = obj.get_sandwiched();
      if(temp13==null) { is_equal = false; return; }
      history.push(temp13);
    }
  }}
  public void after_sandwiched(Repetit_n source, Kernel_Sandwich dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Repetit_n host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_nonempty(Kernel source, Term dest) {{
    if (is_equal) {
      Kernel obj = (Kernel) history.peek();
      Object temp14 = obj.get_nonempty();
      if(temp14==null) { is_equal = false; return; }
      history.push(temp14);
    }
  }}
  public void after_nonempty(Kernel source, Term dest) {{
    if (is_equal) history.pop();
  }}
  public void before_repeated(Kernel source, Term_Sandwich dest) {{
    if (is_equal) {
      Kernel obj = (Kernel) history.peek();
      Object temp15 = obj.get_repeated();
      if(temp15==null) { is_equal = false; return; }
      history.push(temp15);
    }
  }}
  public void after_repeated(Kernel source, Term_Sandwich dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Kernel host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before(Any_vertex host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before(Vertex host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
    Object temp16 = host.get_vertex_name();
    Object temp17 = ((Vertex) obj).get_vertex_name();
    if(temp16 == null && temp17 == null) {}
    else if(temp16 == null ||
            temp17 == null ||
            !temp16.equals(temp17)) { is_equal = false; return; }
  }}
  public void before(Syntax_vertex host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before(Print_command host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before(Print_indent host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before(Print_unindent host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before(Print_skip host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before(Print_space host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before(Regular_syntax host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
    Object temp18 = host.get_string();
    Object temp19 = ((Regular_syntax) obj).get_string();
    if(temp18 == null && temp19 == null) {}
    else if(temp18 == null ||
            temp19 == null ||
            !temp18.equals(temp19)) { is_equal = false; return; }
  }}
  public void before_vertex(Opt_labeled_term source, Term dest) {{
    if (is_equal) {
      Opt_labeled_term obj = (Opt_labeled_term) history.peek();
      Object temp20 = obj.get_vertex();
      if(temp20==null) { is_equal = false; return; }
      history.push(temp20);
    }
  }}
  public void after_vertex(Opt_labeled_term source, Term dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Opt_labeled_term host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before(Regular host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before(Labeled host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
    Object temp21 = host.get_label_name();
    Object temp22 = ((Labeled) obj).get_label_name();
    if(temp21 == null && temp22 == null) {}
    else if(temp21 == null ||
            temp22 == null ||
            !temp21.equals(temp22)) { is_equal = false; return; }
  }}
  public void before_vertex(Term source, Vertex dest) {{
    if (is_equal) {
      Term obj = (Term) history.peek();
      Object temp23 = obj.get_vertex();
      if(temp23==null) { is_equal = false; return; }
      history.push(temp23);
    }
  }}
  public void after_vertex(Term source, Vertex dest) {{
    if (is_equal) history.pop();
  }}
  public void before_module_name(Term source, Module_name dest) {{
    if (is_equal) {
      Term obj = (Term) history.peek();
      Object temp24 = obj.get_module_name();
      if(temp24==null) { is_equal = false; return; }
      history.push(temp24);
    }
  }}
  public void after_module_name(Term source, Module_name dest) {{
    if (is_equal) history.pop();
  }}
  public void before_actual_parameters(Term source, Term_Comma_list dest) {{
    if (is_equal) {
      Term obj = (Term) history.peek();
      Object temp25 = obj.get_actual_parameters();
      if(temp25==null) { is_equal = false; return; }
      history.push(temp25);
    }
  }}
  public void after_actual_parameters(Term source, Term_Comma_list dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Term host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before(Module_name host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
    Object temp26 = host.get_module_name();
    Object temp27 = ((Module_name) obj).get_module_name();
    if(temp26 == null && temp27 == null) {}
    else if(temp26 == null ||
            temp27 == null ||
            !temp26.equals(temp27)) { is_equal = false; return; }
  }}
  public void before(Normal host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_opt(Optional_term source, Opt_labeled_term_Sandwich dest) {{
    if (is_equal) {
      Optional_term obj = (Optional_term) history.peek();
      Object temp28 = obj.get_opt();
      if(temp28==null) { is_equal = false; return; }
      history.push(temp28);
    }
  }}
  public void after_opt(Optional_term source, Opt_labeled_term_Sandwich dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Optional_term host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before(PrintVisitor host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
    is_equal = is_equal && host.get_indent() == ((PrintVisitor) obj).get_indent();
    is_equal = is_equal && host.get_needSpace() == ((PrintVisitor) obj).get_needSpace();
  }}
  public void before(CopyVisitor host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
    Object temp29 = host.get_copy();
    Object temp30 = ((CopyVisitor) obj).get_copy();
    if(temp29 == null && temp30 == null) {}
    else if(temp29 == null ||
            temp30 == null ||
            !temp29.equals(temp30)) { is_equal = false; return; }
  }}
  public void before(SubgraphVisitor host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
    is_equal = is_equal && host.get_is_equal() == ((SubgraphVisitor) obj).get_is_equal();
  }}
  public void before(EqualVisitor host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
    is_equal = is_equal && host.get_is_equal() == ((EqualVisitor) obj).get_is_equal();
  }}
  public void before(DisplayVisitor host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
    is_equal = is_equal && host.get_indent() == ((DisplayVisitor) obj).get_indent();
  }}
  public void before(TraceVisitor host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
    is_equal = is_equal && host.get_indent() == ((TraceVisitor) obj).get_indent();
  }}
  public void before(UniversalVisitor host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_first(Adjacency_Nlist source, Nonempty_Adjacency_Nlist dest) {{
    if (is_equal) {
      Adjacency_Nlist obj = (Adjacency_Nlist) history.peek();
      Object temp31 = obj.get_first();
      if(temp31==null) { is_equal = false; return; }
      history.push(temp31);
    }
  }}
  public void after_first(Adjacency_Nlist source, Nonempty_Adjacency_Nlist dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Adjacency_Nlist host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_first(Import_SList source, Nonempty_Import_SList dest) {{
    if (is_equal) {
      Import_SList obj = (Import_SList) history.peek();
      Object temp32 = obj.get_first();
      if(temp32==null) { is_equal = false; return; }
      history.push(temp32);
    }
  }}
  public void after_first(Import_SList source, Nonempty_Import_SList dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Import_SList host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_first(Vertex_Comma_list source, Nonempty_Vertex_Comma_list dest) {{
    if (is_equal) {
      Vertex_Comma_list obj = (Vertex_Comma_list) history.peek();
      Object temp33 = obj.get_first();
      if(temp33==null) { is_equal = false; return; }
      history.push(temp33);
    }
  }}
  public void after_first(Vertex_Comma_list source, Nonempty_Vertex_Comma_list dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Vertex_Comma_list host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_first(Any_vertex_List source, Nonempty_Any_vertex_List dest) {{
    if (is_equal) {
      Any_vertex_List obj = (Any_vertex_List) history.peek();
      Object temp34 = obj.get_first();
      if(temp34==null) { is_equal = false; return; }
      history.push(temp34);
    }
  }}
  public void after_first(Any_vertex_List source, Nonempty_Any_vertex_List dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Any_vertex_List host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_first(Term_Bar_list source, Nonempty_Term_Bar_list dest) {{
    if (is_equal) {
      Term_Bar_list obj = (Term_Bar_list) history.peek();
      Object temp35 = obj.get_first();
      if(temp35==null) { is_equal = false; return; }
      history.push(temp35);
    }
  }}
  public void after_first(Term_Bar_list source, Nonempty_Term_Bar_list dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Term_Bar_list host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_first(Kernel_Sandwich source, Syntax_vertex_List dest) {{
    if (is_equal) {
      Kernel_Sandwich obj = (Kernel_Sandwich) history.peek();
      Object temp36 = obj.get_first();
      if(temp36==null) { is_equal = false; return; }
      history.push(temp36);
    }
  }}
  public void after_first(Kernel_Sandwich source, Syntax_vertex_List dest) {{
    if (is_equal) history.pop();
  }}
  public void before_inner(Kernel_Sandwich source, Kernel dest) {{
    if (is_equal) {
      Kernel_Sandwich obj = (Kernel_Sandwich) history.peek();
      Object temp37 = obj.get_inner();
      if(temp37==null) { is_equal = false; return; }
      history.push(temp37);
    }
  }}
  public void after_inner(Kernel_Sandwich source, Kernel dest) {{
    if (is_equal) history.pop();
  }}
  public void before_second(Kernel_Sandwich source, Syntax_vertex_List dest) {{
    if (is_equal) {
      Kernel_Sandwich obj = (Kernel_Sandwich) history.peek();
      Object temp38 = obj.get_second();
      if(temp38==null) { is_equal = false; return; }
      history.push(temp38);
    }
  }}
  public void after_second(Kernel_Sandwich source, Syntax_vertex_List dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Kernel_Sandwich host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_first(Term_Sandwich source, Syntax_vertex_List dest) {{
    if (is_equal) {
      Term_Sandwich obj = (Term_Sandwich) history.peek();
      Object temp39 = obj.get_first();
      if(temp39==null) { is_equal = false; return; }
      history.push(temp39);
    }
  }}
  public void after_first(Term_Sandwich source, Syntax_vertex_List dest) {{
    if (is_equal) history.pop();
  }}
  public void before_inner(Term_Sandwich source, Term dest) {{
    if (is_equal) {
      Term_Sandwich obj = (Term_Sandwich) history.peek();
      Object temp40 = obj.get_inner();
      if(temp40==null) { is_equal = false; return; }
      history.push(temp40);
    }
  }}
  public void after_inner(Term_Sandwich source, Term dest) {{
    if (is_equal) history.pop();
  }}
  public void before_second(Term_Sandwich source, Syntax_vertex_List dest) {{
    if (is_equal) {
      Term_Sandwich obj = (Term_Sandwich) history.peek();
      Object temp41 = obj.get_second();
      if(temp41==null) { is_equal = false; return; }
      history.push(temp41);
    }
  }}
  public void after_second(Term_Sandwich source, Syntax_vertex_List dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Term_Sandwich host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_first(Term_Comma_list source, Nonempty_Term_Comma_list dest) {{
    if (is_equal) {
      Term_Comma_list obj = (Term_Comma_list) history.peek();
      Object temp42 = obj.get_first();
      if(temp42==null) { is_equal = false; return; }
      history.push(temp42);
    }
  }}
  public void after_first(Term_Comma_list source, Nonempty_Term_Comma_list dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Term_Comma_list host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_first(Opt_labeled_term_Sandwich source, Syntax_vertex_List dest) {{
    if (is_equal) {
      Opt_labeled_term_Sandwich obj = (Opt_labeled_term_Sandwich) history.peek();
      Object temp43 = obj.get_first();
      if(temp43==null) { is_equal = false; return; }
      history.push(temp43);
    }
  }}
  public void after_first(Opt_labeled_term_Sandwich source, Syntax_vertex_List dest) {{
    if (is_equal) history.pop();
  }}
  public void before_inner(Opt_labeled_term_Sandwich source, Opt_labeled_term dest) {{
    if (is_equal) {
      Opt_labeled_term_Sandwich obj = (Opt_labeled_term_Sandwich) history.peek();
      Object temp44 = obj.get_inner();
      if(temp44==null) { is_equal = false; return; }
      history.push(temp44);
    }
  }}
  public void after_inner(Opt_labeled_term_Sandwich source, Opt_labeled_term dest) {{
    if (is_equal) history.pop();
  }}
  public void before_second(Opt_labeled_term_Sandwich source, Syntax_vertex_List dest) {{
    if (is_equal) {
      Opt_labeled_term_Sandwich obj = (Opt_labeled_term_Sandwich) history.peek();
      Object temp45 = obj.get_second();
      if(temp45==null) { is_equal = false; return; }
      history.push(temp45);
    }
  }}
  public void after_second(Opt_labeled_term_Sandwich source, Syntax_vertex_List dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Opt_labeled_term_Sandwich host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_first(Syntax_vertex_List source, Nonempty_Syntax_vertex_List dest) {{
    if (is_equal) {
      Syntax_vertex_List obj = (Syntax_vertex_List) history.peek();
      Object temp46 = obj.get_first();
      if(temp46==null) { is_equal = false; return; }
      history.push(temp46);
    }
  }}
  public void after_first(Syntax_vertex_List source, Nonempty_Syntax_vertex_List dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Syntax_vertex_List host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_next(Nonempty_PackageName source, Nonempty_PackageName dest) {{
    if (is_equal) {
      Nonempty_PackageName obj = (Nonempty_PackageName) history.peek();
      Object temp49 = obj.get_next();
      if(temp49==null) { is_equal = false; return; }
      history.push(temp49);
    }
  }}
  public void after_next(Nonempty_PackageName source, Nonempty_PackageName dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Nonempty_PackageName host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
    Object temp47 = host.get_it();
    Object temp48 = ((Nonempty_PackageName) obj).get_it();
    if(temp47 == null && temp48 == null) {}
    else if(temp47 == null ||
            temp48 == null ||
            !temp47.equals(temp48)) { is_equal = false; return; }
  }}
  public void before_it(Nonempty_Adjacency_Nlist source, Adjacency dest) {{
    if (is_equal) {
      Nonempty_Adjacency_Nlist obj = (Nonempty_Adjacency_Nlist) history.peek();
      Object temp50 = obj.get_it();
      if(temp50==null) { is_equal = false; return; }
      history.push(temp50);
    }
  }}
  public void after_it(Nonempty_Adjacency_Nlist source, Adjacency dest) {{
    if (is_equal) history.pop();
  }}
  public void before_next(Nonempty_Adjacency_Nlist source, Nonempty_Adjacency_Nlist dest) {{
    if (is_equal) {
      Nonempty_Adjacency_Nlist obj = (Nonempty_Adjacency_Nlist) history.peek();
      Object temp51 = obj.get_next();
      if(temp51==null) { is_equal = false; return; }
      history.push(temp51);
    }
  }}
  public void after_next(Nonempty_Adjacency_Nlist source, Nonempty_Adjacency_Nlist dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Nonempty_Adjacency_Nlist host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_it(Nonempty_Import_SList source, Import dest) {{
    if (is_equal) {
      Nonempty_Import_SList obj = (Nonempty_Import_SList) history.peek();
      Object temp52 = obj.get_it();
      if(temp52==null) { is_equal = false; return; }
      history.push(temp52);
    }
  }}
  public void after_it(Nonempty_Import_SList source, Import dest) {{
    if (is_equal) history.pop();
  }}
  public void before_next(Nonempty_Import_SList source, Nonempty_Import_SList dest) {{
    if (is_equal) {
      Nonempty_Import_SList obj = (Nonempty_Import_SList) history.peek();
      Object temp53 = obj.get_next();
      if(temp53==null) { is_equal = false; return; }
      history.push(temp53);
    }
  }}
  public void after_next(Nonempty_Import_SList source, Nonempty_Import_SList dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Nonempty_Import_SList host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_it(Nonempty_Vertex_Comma_list source, Vertex dest) {{
    if (is_equal) {
      Nonempty_Vertex_Comma_list obj = (Nonempty_Vertex_Comma_list) history.peek();
      Object temp54 = obj.get_it();
      if(temp54==null) { is_equal = false; return; }
      history.push(temp54);
    }
  }}
  public void after_it(Nonempty_Vertex_Comma_list source, Vertex dest) {{
    if (is_equal) history.pop();
  }}
  public void before_next(Nonempty_Vertex_Comma_list source, Nonempty_Vertex_Comma_list dest) {{
    if (is_equal) {
      Nonempty_Vertex_Comma_list obj = (Nonempty_Vertex_Comma_list) history.peek();
      Object temp55 = obj.get_next();
      if(temp55==null) { is_equal = false; return; }
      history.push(temp55);
    }
  }}
  public void after_next(Nonempty_Vertex_Comma_list source, Nonempty_Vertex_Comma_list dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Nonempty_Vertex_Comma_list host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_it(Nonempty_Any_vertex_List source, Any_vertex dest) {{
    if (is_equal) {
      Nonempty_Any_vertex_List obj = (Nonempty_Any_vertex_List) history.peek();
      Object temp56 = obj.get_it();
      if(temp56==null) { is_equal = false; return; }
      history.push(temp56);
    }
  }}
  public void after_it(Nonempty_Any_vertex_List source, Any_vertex dest) {{
    if (is_equal) history.pop();
  }}
  public void before_next(Nonempty_Any_vertex_List source, Nonempty_Any_vertex_List dest) {{
    if (is_equal) {
      Nonempty_Any_vertex_List obj = (Nonempty_Any_vertex_List) history.peek();
      Object temp57 = obj.get_next();
      if(temp57==null) { is_equal = false; return; }
      history.push(temp57);
    }
  }}
  public void after_next(Nonempty_Any_vertex_List source, Nonempty_Any_vertex_List dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Nonempty_Any_vertex_List host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_it(Nonempty_Term_Bar_list source, Term dest) {{
    if (is_equal) {
      Nonempty_Term_Bar_list obj = (Nonempty_Term_Bar_list) history.peek();
      Object temp58 = obj.get_it();
      if(temp58==null) { is_equal = false; return; }
      history.push(temp58);
    }
  }}
  public void after_it(Nonempty_Term_Bar_list source, Term dest) {{
    if (is_equal) history.pop();
  }}
  public void before_next(Nonempty_Term_Bar_list source, Nonempty_Term_Bar_list dest) {{
    if (is_equal) {
      Nonempty_Term_Bar_list obj = (Nonempty_Term_Bar_list) history.peek();
      Object temp59 = obj.get_next();
      if(temp59==null) { is_equal = false; return; }
      history.push(temp59);
    }
  }}
  public void after_next(Nonempty_Term_Bar_list source, Nonempty_Term_Bar_list dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Nonempty_Term_Bar_list host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_it(Nonempty_Term_Comma_list source, Term dest) {{
    if (is_equal) {
      Nonempty_Term_Comma_list obj = (Nonempty_Term_Comma_list) history.peek();
      Object temp60 = obj.get_it();
      if(temp60==null) { is_equal = false; return; }
      history.push(temp60);
    }
  }}
  public void after_it(Nonempty_Term_Comma_list source, Term dest) {{
    if (is_equal) history.pop();
  }}
  public void before_next(Nonempty_Term_Comma_list source, Nonempty_Term_Comma_list dest) {{
    if (is_equal) {
      Nonempty_Term_Comma_list obj = (Nonempty_Term_Comma_list) history.peek();
      Object temp61 = obj.get_next();
      if(temp61==null) { is_equal = false; return; }
      history.push(temp61);
    }
  }}
  public void after_next(Nonempty_Term_Comma_list source, Nonempty_Term_Comma_list dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Nonempty_Term_Comma_list host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  public void before_it(Nonempty_Syntax_vertex_List source, Syntax_vertex dest) {{
    if (is_equal) {
      Nonempty_Syntax_vertex_List obj = (Nonempty_Syntax_vertex_List) history.peek();
      Object temp62 = obj.get_it();
      if(temp62==null) { is_equal = false; return; }
      history.push(temp62);
    }
  }}
  public void after_it(Nonempty_Syntax_vertex_List source, Syntax_vertex dest) {{
    if (is_equal) history.pop();
  }}
  public void before_next(Nonempty_Syntax_vertex_List source, Nonempty_Syntax_vertex_List dest) {{
    if (is_equal) {
      Nonempty_Syntax_vertex_List obj = (Nonempty_Syntax_vertex_List) history.peek();
      Object temp63 = obj.get_next();
      if(temp63==null) { is_equal = false; return; }
      history.push(temp63);
    }
  }}
  public void after_next(Nonempty_Syntax_vertex_List source, Nonempty_Syntax_vertex_List dest) {{
    if (is_equal) history.pop();
  }}
  public void before(Nonempty_Syntax_vertex_List host) {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}
  boolean get_return_val() {{ return is_equal ; }}
{{  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_);
  }
}}
}