code: public int convertIndexToField(int index, boolean bDisplayOption, int iMoveMode)
      {       // Must be overidden
          if (this.getNextConverter() != null)
              return this.getNextConverter().convertIndexToField(index, bDisplayOption, iMoveMode);
          else
              return super.convertIndexToField(index, bDisplayOption, iMoveMode);
      }
docs: Convert the display's index to the field value and move to field.
  @param index The index to convert an set this field to.
  @param bDisplayOption If true, display the change in the converters.
  @param iMoveMove The type of move.