ID can be null

tvdijen · tvdijen · commit 22d70f7bc0b7 · 2021-04-18T17:27:46.000+02:00
diff --git a/src/XML/ds/SignedInfo.php b/src/XML/ds/SignedInfo.php
@@ -16,8 +16,8 @@
  */
 final class SignedInfo extends AbstractDsElement
 {
-    /** @var string */
-    protected string $Id;
+    /** @var string|null */
+    protected ?string $Id;
 
     /**
      * @var \SimpleSAML\XMLSecurity\XML\ds\CanonicalizationMethod
