public function castToString()
    {
        if ($this->attributes['meta_type'] == 'array') {
            return $this->attributes['meta_value'];
        }

        $value = $this->getValue();

        if ($this->isStringable($value) || is_object($value) && method_exists($value, '__toString')) {
            return (string) $value;
        }

        return '';
    }