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

import edu.neu.ccs.demeter.*;
add: abstract class DataItem {
  protected String name;
  public String get_name() {{ return name; }}
  public void set_name(String new_name)
    {{ name = new_name; }}
  protected String type;
  public String get_type() {{ return type; }}
  public void set_type(String new_type)
    {{ type = new_type; }}
  protected Boolean nillable_flag;
  public Boolean get_nillable_flag() {{ return nillable_flag; }}
  public void set_nillable_flag(Boolean new_nillable_flag)
    {{ nillable_flag = new_nillable_flag; }}
  public constructor DataItem() {{ super(); }}
  public constructor DataItem(String name, String type, Boolean nillable_flag) {{
    super();
    set_name(name);
    set_type(type);
    set_nillable_flag(nillable_flag);
  }}
{{  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_) {
    ((UniversalVisitor) _v_).before_name(this, name);
    ((UniversalVisitor) _v_).after_name(this, name);
    ((UniversalVisitor) _v_).before_type(this, type);
    ((UniversalVisitor) _v_).after_type(this, type);
    if (nillable_flag != null) {
      ((UniversalVisitor) _v_).before_nillable_flag(this, nillable_flag);
      ((UniversalVisitor) _v_).after_nillable_flag(this, nillable_flag);
    }
  }
}}
{{  void printClasses_CDDef_trv_bef(GenerateCDVisitor __v0) {
    ((UniversalVisitor) __v0).before(this);
  }
}}
{{  void printClasses_CDDef_trv_aft(GenerateCDVisitor __v0) {
    ((UniversalVisitor) __v0).after(this);
  }
}}
{{  void printClasses_CDDef_trv(GenerateCDVisitor __v0) {
    ((UniversalVisitor) __v0).before_name(this, name);
    ((UniversalVisitor) __v0).after_name(this, name);
    ((UniversalVisitor) __v0).before_type(this, type);
    ((UniversalVisitor) __v0).after_type(this, type);
    if (nillable_flag != null) {
      ((UniversalVisitor) __v0).before_nillable_flag(this, nillable_flag);
      ((UniversalVisitor) __v0).after_nillable_flag(this, nillable_flag);
    }
  }
}}
{{  void printInits_CDDef_trv_bef(GenerateInitsVisitor __v0) {
    ((UniversalVisitor) __v0).before(this);
  }
}}
{{  void printInits_CDDef_trv_aft(GenerateInitsVisitor __v0) {
    ((UniversalVisitor) __v0).after(this);
  }
}}
{{  void printInits_CDDef_trv(GenerateInitsVisitor __v0) {
    ((UniversalVisitor) __v0).before_name(this, name);
    ((UniversalVisitor) __v0).after_name(this, name);
    ((UniversalVisitor) __v0).before_type(this, type);
    ((UniversalVisitor) __v0).after_type(this, type);
    if (nillable_flag != null) {
      ((UniversalVisitor) __v0).before_nillable_flag(this, nillable_flag);
      ((UniversalVisitor) __v0).after_nillable_flag(this, nillable_flag);
    }
  }
}}
{{  void printValidations_CDDef_trv_bef(GenerateValidationsVisitor __v0) {
    ((UniversalVisitor) __v0).before(this);
  }
}}
{{  void printValidations_CDDef_trv_aft(GenerateValidationsVisitor __v0) {
    ((UniversalVisitor) __v0).after(this);
  }
}}
{{  void printValidations_CDDef_trv(GenerateValidationsVisitor __v0) {
    ((UniversalVisitor) __v0).before_name(this, name);
    ((UniversalVisitor) __v0).after_name(this, name);
    ((UniversalVisitor) __v0).before_type(this, type);
    ((UniversalVisitor) __v0).after_type(this, type);
    if (nillable_flag != null) {
      ((UniversalVisitor) __v0).before_nillable_flag(this, nillable_flag);
      ((UniversalVisitor) __v0).after_nillable_flag(this, nillable_flag);
    }
  }
}}
{{  void __trav_print_CDDef_trv_bef(DisplayVisitor __v0) {
    ((UniversalVisitor) __v0).before(this);
  }
}}
{{  void __trav_print_CDDef_trv_aft(DisplayVisitor __v0) {
    ((UniversalVisitor) __v0).after(this);
  }
}}
{{  void __trav_print_CDDef_trv(DisplayVisitor __v0) {
    ((DisplayVisitor) __v0).before_name(this, name);
    ((UniversalVisitor) __v0).after_name(this, name);
    ((DisplayVisitor) __v0).before_type(this, type);
    ((UniversalVisitor) __v0).after_type(this, type);
    if (nillable_flag != null) {
      ((DisplayVisitor) __v0).before_nillable_flag(this, nillable_flag);
      ((UniversalVisitor) __v0).after_nillable_flag(this, nillable_flag);
    }
  }
}}
{{  void getPartInits_DataClass_trv_bef(GenerateInitsVisitor __v0) {
    ((UniversalVisitor) __v0).before(this);
  }
}}
{{  void getPartInits_DataClass_trv_aft(GenerateInitsVisitor __v0) {
    ((UniversalVisitor) __v0).after(this);
  }
}}
{{  void getPartInits_DataClass_trv(GenerateInitsVisitor __v0) {
    ((UniversalVisitor) __v0).before_name(this, name);
    ((UniversalVisitor) __v0).after_name(this, name);
    ((UniversalVisitor) __v0).before_type(this, type);
    ((UniversalVisitor) __v0).after_type(this, type);
    if (nillable_flag != null) {
      ((UniversalVisitor) __v0).before_nillable_flag(this, nillable_flag);
      ((UniversalVisitor) __v0).after_nillable_flag(this, nillable_flag);
    }
  }
}}
{{  void getPartValidations_DataClass_trv_bef(GenerateValidationsVisitor __v0) {
    ((UniversalVisitor) __v0).before(this);
  }
}}
{{  void getPartValidations_DataClass_trv_aft(GenerateValidationsVisitor __v0) {
    ((UniversalVisitor) __v0).after(this);
  }
}}
{{  void getPartValidations_DataClass_trv(GenerateValidationsVisitor __v0) {
    ((UniversalVisitor) __v0).before_name(this, name);
    ((UniversalVisitor) __v0).after_name(this, name);
    ((UniversalVisitor) __v0).before_type(this, type);
    ((UniversalVisitor) __v0).after_type(this, type);
    if (nillable_flag != null) {
      ((UniversalVisitor) __v0).before_nillable_flag(this, nillable_flag);
      ((UniversalVisitor) __v0).after_nillable_flag(this, nillable_flag);
    }
  }
}}
}