core:

import edu.neu.ccs.demeter.*;
add: class Quantity {
  protected Number number;
  public Number get_number() {{ return number; }}
  public void set_number(Number new_number)
    {{ number = new_number; }}
  public constructor Quantity() {{ super(); }}
  public constructor Quantity(Number number) {{
    super();
    set_number(number);
  }}
  public static Quantity parse(java.io.Reader in)
    throws ParseException
  {{ return new Parser(in)._Quantity(); }}
  public static Quantity parse(java.io.InputStream in)
    throws ParseException
  {{ return new Parser(in)._Quantity(); }}
  public static Quantity 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_number(this, number);
    ((UniversalVisitor) _v_).after_number(this, number);
    universal_trv0_aft(_v_);
  }
}}
{{  void toAll_ShoeOrder_trv_bef(UniversalVisitor __v0) {
    ((UniversalVisitor) __v0).before(this);
  }
}}
{{  void toAll_ShoeOrder_trv_aft(UniversalVisitor __v0) {
    ((UniversalVisitor) __v0).after(this);
  }
}}
{{  void toAll_ShoeOrder_trv(UniversalVisitor __v0) {
    toAll_ShoeOrder_trv_bef(__v0);
    ((UniversalVisitor) __v0).before_number(this, number);
    ((UniversalVisitor) __v0).after_number(this, number);
    toAll_ShoeOrder_trv_aft(__v0);
  }
}}
{{  void toAllQuantities_ShoeOrder_trv_bef(UniversalVisitor __v0) {
    ((UniversalVisitor) __v0).before(this);
  }
}}
{{  void toAllQuantities_ShoeOrder_trv_aft(UniversalVisitor __v0) {
    ((UniversalVisitor) __v0).after(this);
  }
}}
{{  void toAllQuantities_ShoeOrder_trv(UniversalVisitor __v0) {
    toAllQuantities_ShoeOrder_trv_bef(__v0);
    toAllQuantities_ShoeOrder_trv_aft(__v0);
  }
}}
{{  void __trav_sumWithDebugging_ShoeOrder_trv_bef(SummingVisitor __v0, TraceVisitor __v1) {
    ((SummingVisitor) __v0).before(this);
    ((TraceVisitor) __v1).before(this);
  }
}}
{{  void __trav_sumWithDebugging_ShoeOrder_trv_aft(SummingVisitor __v0, TraceVisitor __v1) {
    ((TraceVisitor) __v1).after(this);
    ((UniversalVisitor) __v0).after(this);
  }
}}
{{  void __trav_sumWithDebugging_ShoeOrder_trv(SummingVisitor __v0, TraceVisitor __v1) {
    __trav_sumWithDebugging_ShoeOrder_trv_bef(__v0, __v1);
    __trav_sumWithDebugging_ShoeOrder_trv_aft(__v0, __v1);
  }
}}
}