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

import edu.neu.ccs.demeter.*;
add: class DataElement extends DataItem {
  protected Boolean abstract_ind;
  public Boolean get_abstract_ind() {{ return abstract_ind; }}
  public void set_abstract_ind(Boolean new_abstract_ind)
    {{ abstract_ind = new_abstract_ind; }}
  public constructor DataElement() {{ super(); }}
  public constructor DataElement(String name, String type, Boolean nillable_flag, Boolean abstract_ind) {{
    super(name, type, nillable_flag);
    set_abstract_ind(abstract_ind);
  }}
  public static DataElement parse(java.io.Reader in)
    throws ParseException
  {{ return new Parser(in)._DataElement(); }}
  public static DataElement parse(java.io.InputStream in)
    throws ParseException
  {{ return new Parser(in)._DataElement(); }}
  public static DataElement 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 (abstract_ind != null) {
      ((UniversalVisitor) _v_).before_abstract_ind(this, abstract_ind);
      ((UniversalVisitor) _v_).after_abstract_ind(this, abstract_ind);
    }
    super.universal_trv0(_v_);
    universal_trv0_aft(_v_);
  }
}}
{{  void printClasses_CDDef_trv(GenerateCDVisitor __v0) {  }
}}
{{  void printInits_CDDef_trv(GenerateInitsVisitor __v0) {  }
}}
{{  void printValidations_CDDef_trv(GenerateValidationsVisitor __v0) {  }
}}
{{  void __trav_print_CDDef_trv_bef(DisplayVisitor __v0) {
    super.__trav_print_CDDef_trv_bef(__v0);
    ((DisplayVisitor) __v0).before(this);
  }
}}
{{  void __trav_print_CDDef_trv_aft(DisplayVisitor __v0) {
    ((DisplayVisitor) __v0).after(this);
    super.__trav_print_CDDef_trv_aft(__v0);
  }
}}
{{  void __trav_print_CDDef_trv(DisplayVisitor __v0) {
    __trav_print_CDDef_trv_bef(__v0);
    if (abstract_ind != null) {
      ((DisplayVisitor) __v0).before_abstract_ind(this, abstract_ind);
      ((UniversalVisitor) __v0).after_abstract_ind(this, abstract_ind);
    }
    super.__trav_print_CDDef_trv(__v0);
    __trav_print_CDDef_trv_aft(__v0);
  }
}}
{{  void getPartInits_DataClass_trv(GenerateInitsVisitor __v0) {  }
}}
{{  void getPartValidations_DataClass_trv(GenerateValidationsVisitor __v0) {  }
}}
}