ArgumentDefaultTest.php

<?php

namespace Drupal\views_test_data\Plugin\views\argument_default;

use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\views\Attribute\ViewsArgumentDefault;
use Drupal\views\Plugin\views\argument_default\ArgumentDefaultPluginBase;

/**
 * Defines an argument default test plugin.
 */
class ArgumentDefaultTest extends ArgumentDefaultPluginBase {
  
  /**
   * {@inheritdoc}
   */
  protected function defineOptions() {
    $options = parent::defineOptions();
    $options['value'] = [
      'default' => '',
    ];
    return $options;
  }
  
  /**
   * {@inheritdoc}
   */
  public function getArgument() {
    $this->view->element['#cache']['tags'][] = 'example_tag';
    return $this->options['value'];
  }
  
  /**
   * {@inheritdoc}
   */
  public function calculateDependencies() {
    return [
      'content' => [
        'ArgumentDefaultTest',
      ],
    ];
  }

}