None.php

<?php

namespace Drupal\views\Plugin\views\argument_validator;

use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\views\Attribute\ViewsArgumentValidator;

/**
 * Do not validate the argument.
 *
 * @ingroup views_argument_validate_plugins
 */
class None extends ArgumentValidatorPluginBase {
  
  /**
   * {@inheritdoc}
   */
  public function validateArgument($argument) {
    if (!empty($this->argument->options['must_not_be'])) {
      return !isset($argument);
    }
    if (!isset($argument) || $argument === '') {
      return FALSE;
    }
    if (!empty($this->argument->definition['numeric']) && !isset($this->argument->options['break_phrase'])) {
      return FALSE;
    }
    return TRUE;
  }

}