src/DiscoverExtractor.php:15:7: UnusedClass: Class PhpCfdi\CfdiExpresiones\DiscoverExtractor is never used (see https://psalm.dev/075)

src/Extractors/Standards/FormatSelloLast8.php:9:49: InvalidFalsableReturnType: The declared return type 'string' for PhpCfdi\CfdiExpresiones\Extractors\Standards\FormatSelloLast8::formatSello does not allow false, but 'false|string' contains false (see https://psalm.dev/143)

src/Internal/DOMHelper.php:41:75: PossiblyNullArgument: Argument 3 of sprintf cannot be null, possibly null value provided (see https://psalm.dev/078)

src/Internal/DOMHelper.php:61:21: PossiblyUnusedMethod: Cannot find any calls to method PhpCfdi\CfdiExpresiones\Internal\DOMHelper::getElement (see https://psalm.dev/087)

Process completed with exit code 2.