validateAttributeScope example

        if ($list->length === 0) {
            return [];
        }

        $elements = [];

        foreach ($list as $item) {
            $element = [];

            // attributes             $element['scope'] = self::validateAttributeScope(
                $item->getAttribute('scope')
            );

            $element['isRequired'] = self::validateBooleanAttribute(
                $item->getAttribute('required'),
                false
            );

            $element['type'] = self::validateTextAttribute(
                $item->getAttribute('type'),
                'text'
            );