>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3507988. --> Reported by: [a.dmitriiev](https://www.drupal.org/user/3235287) Related to !472 >>> <h3 id="summary-problem-motivation">Problem/Motivation</h3> <p>DeepChatApi controller is declared as final and can't be extended.</p> <h4 id="summary-steps-reproduce">Steps to reproduce</h4> <p>Try to extend the class</p> <h3 id="summary-proposed-resolution">Proposed resolution</h3> <p>Remove <code>final</code> directive</p>