[3.x] Nullable types must be explicit
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #3511660. -->
Reported by: [millnut](https://www.drupal.org/user/3651684)
Related to !55
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p><a href="https://php.watch/versions/8.4/implicitly-marking-parameter-type-nullable-deprecated">PHP 8.4 has deprecated implicit nullable types.</a></p>
<h4 id="summary-steps-reproduce">Steps to reproduce</h4>
<p>Use in a PHP 8.4 environment</p>
<h3 id="summary-proposed-resolution">Proposed resolution</h3>
<p>Use explicit nullable types (compatible with PHP 7.1+ so no compatibility concerns given Drupal core PHP minimums)</p>
issue