pluginreference-2.0.0/tests/modules/pluginreference_test/src/Plugin/Block/PluginReferenceTestAccessBlock.php

<?php

namespace Drupal\pluginreference_test\Plugin\Block;

use Drupal\Core\Access\AccessResult;
use Drupal\Core\Block\Attribute\Block;
use Drupal\Core\Block\BlockBase;
use Drupal\Core\Session\AccountInterface;
use Drupal\Core\StringTranslation\TranslatableMarkup;

/**
 * Provides a plugin reference test caching block.
 */
#[Block(
  id: 'plugin_reference_test_access_block',
  admin_label: new TranslatableMarkup('Test access block'),
)]
class PluginReferenceTestAccessBlock extends BlockBase {

  /**
   * {@inheritdoc}
   */
  public function build() {
    return 'TEST';
  }

  /**
   * {@inheritdoc}
   */
  protected function blockAccess(AccountInterface $account) {
    return AccessResult::allowedIfHasPermission($account, 'view plugin reference test access block');
  }

}