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__;
  }

}