TrackerPage.php

<?php

namespace Drupal\tracker\Controller;

@trigger_error(__NAMESPACE__ . '\\TrackerPage is deprecated in drupal:8.8.0 and is removed from drupal:9.0.0. Use \\Drupal\\tracker\\Controller\\TrackerController instead. See https://www.drupal.org/node/3030645', E_USER_DEPRECATED);

/**
 * Controller for tracker.page route.
 */
class TrackerPage extends TrackerController {
    
    /**
     * Content callback for the tracker.page route.
     */
    public function getContent() {
        return $this->buildContent();
    }

}