ModuleRequiredTestHooks.php

<?php

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

use Drupal\Core\Extension\Extension;
use Drupal\Core\Hook\Attribute\Hook;

/**
 * Hook implementations for module_required_test.
 */
class ModuleRequiredTestHooks {
    
    /**
     * Implements hook_system_info_alter().
     *
     * Manipulate module dependencies to test dependency chains.
     */
    public function systemInfoAlter(&$info, Extension $file, $type) : void {
        if ($file->getName() == 'module_required_test' && \Drupal::state()->get('module_required_test.hook_system_info_alter')) {
            $info['required'] = TRUE;
            $info['explanation'] = 'Testing hook_system_info_alter()';
        }
    }

}