TestHookRemove.php

<?php

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

use Drupal\Core\Hook\Attribute\Hook;
use Drupal\Core\Hook\Attribute\RemoveHook;

/**
 * Add a hook here, then remove it with another attribute.
 */
class TestHookRemove {
    
    /**
     * This hook should not be run because the next hook replaces it.
     */
    public function hookDoNotRun() : string {
        // This hook should not run.
        return __METHOD__;
    }
    
    /**
     * This hook should run and prevent custom_hook1.
     */
    public function hookDoRun() : string {
        // This hook should run.
        return __METHOD__;
    }

}