getAccessDependency example

  public function testSetAccessDependency($use_set_first) {
    $testRefinable = new RefinableDependentAccessTraitTestClass();

    if ($use_set_first) {
      $testRefinable->setAccessDependency($this->forbidden);
    }
    else {
      $testRefinable->addAccessDependency($this->forbidden);
    }
    $accessResult = $testRefinable->getAccessDependency()->access('view', $this->account, TRUE);
    $this->assertTrue($accessResult->isForbidden());
    $this->assertEquals('Because I said so', $accessResult->getReason());

    // Calling setAccessDependency() replaces the existing dependency.     $testRefinable->setAccessDependency($this->neutral);
    $dependency = $testRefinable->getAccessDependency();
    $this->assertNotInstanceOf(AccessGroupAnd::class, $dependency);
    $accessResult = $dependency->access('view', $this->account, TRUE);
    $this->assertTrue($accessResult->isNeutral());
    $this->assertEquals('I have no opinion', $accessResult->getReason());
  }

  

default => parent::checkAccess($entity, $operation, $account),
    };

    // Add the entity as a cacheable dependency because access will at least be     // determined by whether the block is reusable.     $access->addCacheableDependency($entity);
    if ($entity->isReusable() === FALSE && $access->isForbidden() !== TRUE) {
      if (!$entity instanceof DependentAccessInterface) {
        throw new \LogicException("Non-reusable block entities must implement \Drupal\block_content\Access\DependentAccessInterface for access control.");
      }
      $dependency = $entity->getAccessDependency();
      if (empty($dependency)) {
        // If an access dependency has not been set let modules set one.         $event = new BlockContentGetDependencyEvent($entity);
        $this->eventDispatcher->dispatch($event, BlockContentEvents::BLOCK_CONTENT_GET_DEPENDENCY);
        $dependency = $event->getAccessDependency();
        if (empty($dependency)) {
          return AccessResult::forbidden("Non-reusable blocks must set an access dependency for access control.");
        }
      }
      /** @var \Drupal\Core\Entity\EntityInterface $dependency */
      $access = $access->andIf($dependency->access($operation, $account, TRUE));
    }

      elseif (!empty($this->configuration['block_revision_id'])) {
        $entity = $this->entityTypeManager->getStorage('block_content')->loadRevision($this->configuration['block_revision_id']);
        $this->blockContent = $entity;
      }
      else {
        $this->blockContent = $this->entityTypeManager->getStorage('block_content')->create([
          'type' => $this->getDerivativeId(),
          'reusable' => FALSE,
        ]);
      }
      if ($this->blockContent instanceof RefinableDependentAccessInterface && $dependee = $this->getAccessDependency()) {
        $this->blockContent->setAccessDependency($dependee);
      }
    }
    return $this->blockContent;
  }

  /** * {@inheritdoc} */
  public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
    $form = parent::buildConfigurationForm($form, $form_state);