core:
import java.util.*;
import java.io.*;

import edu.neu.ccs.demeter.*;
add: class ElementGroup extends ElementItem {
  protected NSRef prefixS;
  public NSRef get_prefixS() {{ return prefixS; }}
  public void set_prefixS(NSRef new_prefixS)
    {{ prefixS = new_prefixS; }}
  protected AttrValue_List attrs;
  public AttrValue_List get_attrs() {{ return attrs; }}
  public void set_attrs(AttrValue_List new_attrs)
    {{ attrs = new_attrs; }}
  protected RestOfElementGroup restofelementgroup;
  public RestOfElementGroup get_restofelementgroup() {{ return restofelementgroup; }}
  public void set_restofelementgroup(RestOfElementGroup new_restofelementgroup)
    {{ restofelementgroup = new_restofelementgroup; }}
  public constructor ElementGroup() {{ super(); }}
  public constructor ElementGroup(NSRef prefixS, AttrValue_List attrs, RestOfElementGroup restofelementgroup) {{
    super();
    set_prefixS(prefixS);
    set_attrs(attrs);
    set_restofelementgroup(restofelementgroup);
  }}
  public static ElementGroup parse(java.io.Reader in)
    throws ParseException
  {{ return new Parser(in)._ElementGroup(); }}
  public static ElementGroup parse(java.io.InputStream in)
    throws ParseException
  {{ return new Parser(in)._ElementGroup(); }}
  public static ElementGroup 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_) {
    super.universal_trv0_bef(_v_);
    ((UniversalVisitor) _v_).before(this);
  }
}}
{{  void universal_trv0_aft(UniversalVisitor _v_) {
    ((UniversalVisitor) _v_).after(this);
    super.universal_trv0_aft(_v_);
  }
}}
{{  void universal_trv0(UniversalVisitor _v_) {
    universal_trv0_bef(_v_);
    if (prefixS != null) {
      ((UniversalVisitor) _v_).before_prefixS(this, prefixS);
      prefixS.universal_trv0(_v_);
      ((UniversalVisitor) _v_).after_prefixS(this, prefixS);
    }
    ((UniversalVisitor) _v_).before_attrs(this, attrs);
    attrs.universal_trv0(_v_);
    ((UniversalVisitor) _v_).after_attrs(this, attrs);
    ((UniversalVisitor) _v_).before_restofelementgroup(this, restofelementgroup);
    restofelementgroup.universal_trv0(_v_);
    ((UniversalVisitor) _v_).after_restofelementgroup(this, restofelementgroup);
    super.universal_trv0(_v_);
    universal_trv0_aft(_v_);
  }
}}
{{  void processDefinition_Schema_trv_bef(SchemaVisitor __v0) {
    super.processDefinition_Schema_trv_bef(__v0);
    ((SchemaVisitor) __v0).before(this);
  }
}}
{{  void processDefinition_Schema_trv_aft(SchemaVisitor __v0) {
    ((SchemaVisitor) __v0).after(this);
    super.processDefinition_Schema_trv_aft(__v0);
  }
}}
{{  void processDefinition_Schema_trv(SchemaVisitor __v0) {
    processDefinition_Schema_trv_bef(__v0);
    if (prefixS != null) {
      ((UniversalVisitor) __v0).before_prefixS(this, prefixS);
      prefixS.processDefinition_Schema_trv(__v0);
      ((UniversalVisitor) __v0).after_prefixS(this, prefixS);
    }
    ((UniversalVisitor) __v0).before_attrs(this, attrs);
    attrs.processDefinition_Schema_trv(__v0);
    ((UniversalVisitor) __v0).after_attrs(this, attrs);
    ((UniversalVisitor) __v0).before_restofelementgroup(this, restofelementgroup);
    restofelementgroup.processDefinition_Schema_trv(__v0);
    ((UniversalVisitor) __v0).after_restofelementgroup(this, restofelementgroup);
    super.processDefinition_Schema_trv(__v0);
    processDefinition_Schema_trv_aft(__v0);
  }
}}
{{  void __trav_print_Schema_trv_bef(DisplayVisitor __v0) {
    super.__trav_print_Schema_trv_bef(__v0);
    ((DisplayVisitor) __v0).before(this);
  }
}}
{{  void __trav_print_Schema_trv_aft(DisplayVisitor __v0) {
    ((DisplayVisitor) __v0).after(this);
    super.__trav_print_Schema_trv_aft(__v0);
  }
}}
{{  void __trav_print_Schema_trv(DisplayVisitor __v0) {
    __trav_print_Schema_trv_bef(__v0);
    if (prefixS != null) {
      ((DisplayVisitor) __v0).before_prefixS(this, prefixS);
      prefixS.__trav_print_Schema_trv(__v0);
      ((UniversalVisitor) __v0).after_prefixS(this, prefixS);
    }
    ((DisplayVisitor) __v0).before_attrs(this, attrs);
    attrs.__trav_print_Schema_trv(__v0);
    ((UniversalVisitor) __v0).after_attrs(this, attrs);
    ((DisplayVisitor) __v0).before_restofelementgroup(this, restofelementgroup);
    restofelementgroup.__trav_print_Schema_trv(__v0);
    ((UniversalVisitor) __v0).after_restofelementgroup(this, restofelementgroup);
    super.__trav_print_Schema_trv(__v0);
    __trav_print_Schema_trv_aft(__v0);
  }
}}
}