Debug Access Permissions

DebugAccessController.php

<?php

namespace Drupal\my_module\Controller;

use Drupal\Core\Controller\ControllerBase;

/**
 * Debug access.
 */
class DebugAccessController extends ControllerBase {

  /**
   * Builds the response.
   */
  public function build() {
    $account = \Drupal::entityTypeManager()->getStorage('user')->load(5195);
    $route_name = \Drupal::service('router')->match('/admin/structure')['_route'];
    $parameters = [];

    // Checking the access.
    $debug = \Drupal::service('access_manager')->checkNamedRoute($route_name, $parameters, $account, TRUE);

    dump($debug);

    return ['#markup' => $this->t('The page markup.')];
  }

}