else { getAttributes().remove("readonly"); }
    public void setReadonly(String readonly) {        boolean isReadOnly = "readonly".equalsIgnoreCase(readonly);        if (!isReadOnly) {            BooleanTypeConverter converter = new BooleanTypeConverter();            isReadOnly = converter.convert(readonly, Boolean.class, null);        }        if (isReadOnly) {            set("readonly", "readonly");        }    }