XMLArtifact.php

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<?php

declare(strict_types=1);

namespace ILIAS\Setup\Artifact;

use ILIAS\Setup;

class XMLArtifact implements Setup\Artifact
{
    public function __construct(
        private \SimpleXMLElement $xml
    ) {
    }

    final public function serialize(): string
    {
        $dom = dom_import_simplexml($this->xml)->ownerDocument;
        $dom->formatOutput = true;
        return $dom->saveXML();
    }
}