RestExampleHelpController.php

<?php

namespace Drupal\rest_example\Controller;

use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
use Drupal\examples\Utility\DescriptionTemplateTrait;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Provides a help page for the REST Examples module.
 *
 * @ingroup rest_example
 */
class RestExampleHelpController implements ContainerInjectionInterface {
    use DescriptionTemplateTrait;
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container) {
        return new static();
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getModuleName() {
        return 'rest_example';
    }

}