protected function setErrorLengthRange($field, $label, $min = 1, $max = 255)
    {
        $vars = array('@min' => $min, '@max' => $max, '@field' => $label);
        $error = $this->translation->text('@field must be @min - @max characters long', $vars);
        return $this->setError($field, $error);
    }