code: public void init(BaseField field, BaseField fldDest, BaseField fldSource)
      {
          super.init(field, fldDest, fldSource, false, false, false);
      }
docs: Constructor.
  @param field The basefield owner of this listener (usually null and set on setOwner()).
  @param fldDest The destination field.
  @param fldSource The source field.