>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3581223. --> Reported by: [marcus_johansson](https://www.drupal.org/user/385947) Related to !1343 >>> <p>[Tracker]<br> <strong>Update Summary: </strong>[One-line status update for stakeholders]<br> <strong>Short Description: </strong>[One-line issue summary for stakeholders]<br> <strong>Check-in Date: </strong>MM/DD/YYYY<br> <em>Metadata is used by the <a href="https://www.drupalstarforge.ai/" title="AI Tracker">AI Tracker.</a> Docs and additional fields <a href="https://www.drupalstarforge.ai/ai-dashboard/docs" title="AI Issue Tracker Documentation">here</a>.</em><br> [/Tracker]</p> <h3 id="summary-problem-motivation">Problem/Motivation</h3> <p>As of <span class="drupalorg-gitlab-issue-link project-issue-status-info project-issue-status-7"><a href="https://www.drupal.org/project/drupal/issues/3579673" title="Status: Closed (fixed)">#3579673: Remove lazy declaration and proxy class for MIME type guessers</a></span> the MimeTypeGuesser we used with core/lib/Drupal/Core/ProxyClass/File/MimeType/MimeTypeGuesser.php is deleted. We should have always used core/lib/Drupal/Core/File/MimeType/MimeTypeGuesser.php since that is what the service is actually pointing to.</p> <p>This is used in FileInterface and the FileMimeTypeTrait.</p> <h3 id="summary-proposed-resolution">Proposed resolution</h3> <p>Do the required changes.</p> <h3 id="summary-remaining-tasks">Remaining tasks</h3> <h3>Optional: Other details as applicable (e.g., User interface changes, API changes, Data model changes)</h3> <h3 id="summary-ai-usage">AI usage (if applicable)</h3> <p>[ ] AI Assisted Issue<br> This issue was generated with AI assistance, but was reviewed and refined by the creator.</p> <p>[ ] AI Assisted Code<br> This code was mainly generated by a human, with AI autocompleting or parts AI generated, but under full human supervision.</p> <p>[ ] AI Generated Code<br> This code was mainly generated by an AI with human guidance, and reviewed, tested, and refined by a human.</p> <p>[ ] Vibe Coded<br> This code was generated by an AI and has only been functionally tested.</p>