code: @Override
  	public Error errorFromMessage(StringBuilder holder, String msgID, String text, String... var) {
  		Error err = new Error();
  		err.setMessageId(msgID);
  		// AT&T Restful Error Format requires numbers "%" placements
  		err.setText(Vars.convert(holder, text, var));
  		for(String s : var) {
  			err.getVariables().add(s);
  		}
  		return err;
  	}
docs: ////////////  Mapping Functions /////////////