MediaLibraryFormOverwriteTestHooks.php

<?php

declare (strict_types=1);
namespace Drupal\media_library_form_overwrite_test\Hook;

use Drupal\Core\Hook\Attribute\Hook;
use Drupal\media_library_form_overwrite_test\Form\TestAddForm;

/**
 * Hook implementations for media_library_form_overwrite_test.
 */
class MediaLibraryFormOverwriteTestHooks {
    
    /**
     * Implements hook_media_source_info_alter().
     */
    public function mediaSourceInfoAlter(array &$sources) : void {
        $sources['image']['forms']['media_library_add'] = TestAddForm::class;
    }

}