public StringType addModificationElement() {//2 
      StringType t = new StringType();
      if (this.modification == null)
        this.modification = new ArrayList<StringType>();
      this.modification.add(t);
      return t;
    }
public StringType addModificationElement ( ) { StringType t = new StringType ( ) ; if ( this . modification == null ) this . modification = new ArrayList < StringType > ( ) ; this . modification . add ( t ) ; return t ; }
@return {@link #modification} (Todo.)