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

import edu.neu.ccs.demeter.*;
add: class ChoiceGroup 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 Annotation annotation;
  public Annotation get_annotation() {{ return annotation; }}
  public void set_annotation(Annotation new_annotation)
    {{ annotation = new_annotation; }}
  protected ElementItem_List elementitem_list;
  public ElementItem_List get_elementitem_list() {{ return elementitem_list; }}
  public void set_elementitem_list(ElementItem_List new_elementitem_list)
    {{ elementitem_list = new_elementitem_list; }}
  protected NSRef prefixE;
  public NSRef get_prefixE() {{ return prefixE; }}
  public void set_prefixE(NSRef new_prefixE)
    {{ prefixE = new_prefixE; }}
  public constructor ChoiceGroup() {{ super(); }}
  public constructor ChoiceGroup(NSRef prefixS, AttrValue_List attrs, Annotation annotation, ElementItem_List elementitem_list, NSRef prefixE) {{
    super();
    set_prefixS(prefixS);
    set_attrs(attrs);
    set_annotation(annotation);
    set_elementitem_list(elementitem_list);
    set_prefixE(prefixE);
  }}
  public static ChoiceGroup parse(java.io.Reader in)
    throws ParseException
  {{ return new Parser(in)._ChoiceGroup(); }}
  public static ChoiceGroup parse(java.io.InputStream in)
    throws ParseException
  {{ return new Parser(in)._ChoiceGroup(); }}
  public static ChoiceGroup 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);
    if (annotation != null) {
      ((UniversalVisitor) _v_).before_annotation(this, annotation);
      annotation.universal_trv0(_v_);
      ((UniversalVisitor) _v_).after_annotation(this, annotation);
    }
    ((UniversalVisitor) _v_).before_elementitem_list(this, elementitem_list);
    elementitem_list.universal_trv0(_v_);
    ((UniversalVisitor) _v_).after_elementitem_list(this, elementitem_list);
    if (prefixE != null) {
      ((UniversalVisitor) _v_).before_prefixE(this, prefixE);
      prefixE.universal_trv0(_v_);
      ((UniversalVisitor) _v_).after_prefixE(this, prefixE);
    }
    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);
    if (annotation != null) {
      ((UniversalVisitor) __v0).before_annotation(this, annotation);
      annotation.processDefinition_Schema_trv(__v0);
      ((UniversalVisitor) __v0).after_annotation(this, annotation);
    }
    ((UniversalVisitor) __v0).before_elementitem_list(this, elementitem_list);
    elementitem_list.processDefinition_Schema_trv(__v0);
    ((UniversalVisitor) __v0).after_elementitem_list(this, elementitem_list);
    if (prefixE != null) {
      ((UniversalVisitor) __v0).before_prefixE(this, prefixE);
      prefixE.processDefinition_Schema_trv(__v0);
      ((UniversalVisitor) __v0).after_prefixE(this, prefixE);
    }
    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);
    if (annotation != null) {
      ((DisplayVisitor) __v0).before_annotation(this, annotation);
      annotation.__trav_print_Schema_trv(__v0);
      ((UniversalVisitor) __v0).after_annotation(this, annotation);
    }
    ((DisplayVisitor) __v0).before_elementitem_list(this, elementitem_list);
    elementitem_list.__trav_print_Schema_trv(__v0);
    ((UniversalVisitor) __v0).after_elementitem_list(this, elementitem_list);
    if (prefixE != null) {
      ((DisplayVisitor) __v0).before_prefixE(this, prefixE);
      prefixE.__trav_print_Schema_trv(__v0);
      ((UniversalVisitor) __v0).after_prefixE(this, prefixE);
    }
    super.__trav_print_Schema_trv(__v0);
    __trav_print_Schema_trv_aft(__v0);
  }
}}
}