*/
    protected void verifyCrudMode(final int crudMode, final int expectedMode) {
        if (crudMode != expectedMode) {
            throwValidationError(messages -> {
                messages.addErrorsCrudInvalidMode(GLOBAL, String.valueOf(expectedMode), String.valueOf(crudMode));
            }, this::asListHtml);
        }
    }

    // ===================================================================================

     * @param arg0 The parameter arg0 for message. (NotNull)
     * @param arg1 The parameter arg1 for message. (NotNull)
     * @return this. (NotNull)
     */
    public FessMessages addErrorsCrudInvalidMode(String property, String arg0, String arg1) {
        assertPropertyNotNull(property);
        add(property, new UserMessage(ERRORS_crud_invalid_mode, arg0, arg1));
        return this;
    }

    /**