protected function validateMetaTitle()
    {
        $field = 'meta_title';
        $value = $this->getSubmitted($field);

        if (!isset($value)) {
            $this->unsetSubmitted($field);
            return true;
        }

        if (mb_strlen($value) > 60) {
            $this->setErrorLengthRange($field, $this->translation->text('Meta title'), 0, 60);
            return false;
        }

        return true;
    }