EntityAliasTypeBase plugin gives the following PHPStan warning: Access to an undefined property Drupal\pathauto\Plugin\pathauto\AliasType\EntityAliasTypeBase::$translationManager

Problem/Motivation

The warning is about the following piece of code:

    if (!empty($options['message'])) {
      $this->messenger->addMessage($this->translationManager
        ->formatPlural(count($ids), 'Updated 1 %label URL alias.', 'Updated @count %label URL aliases.'), [
          '%label' => $this->getLabel(),
        ]);
    }

The translationManager service is set in StringTranslationTrait, the service is only available when getStringTranslation method is called.

Proposed resolution

Replace $this->translationManager->formatPlural() with $this->formatPlural() since that is the method that is added by the StringTranslationTrait.