MigrateController.php

<?php

namespace Drupal\migrate_drupal_ui\Controller;

use Drupal\Core\Controller\ControllerBase;

/**
 * Provides controller methods for the migration.
 */
class MigrateController extends ControllerBase {
    
    /**
     * Sets a log filter and redirects to the log.
     *
     * @return \Symfony\Component\HttpFoundation\RedirectResponse
     *   A redirect response object that may be returned by the controller.
     */
    public function showLog() {
        // Sets both the session and the query parameter so that it works correctly
        // with both the watchdog view and the fallback.
        $_SESSION['dblog_overview_filter'] = [];
        $_SESSION['dblog_overview_filter']['type'] = [
            'migrate_drupal_ui' => 'migrate_drupal_ui',
        ];
        return $this->redirect('dblog.overview', [], [
            'query' => [
                'type' => [
                    'migrate_drupal_ui',
                ],
            ],
        ]);
    }

}