class AttributeClassDiscoveryAutomatedProviders

class AttributeClassDiscoveryAutomatedProviders extends AttributeClassDiscovery {
  
  /**
   * Prepares the attribute definition.
   *
   * @param \Drupal\Component\Plugin\Attribute\AttributeInterface $attribute
   *   The attribute derived from the plugin.
   * @param string $class
   *   The class used for the plugin.
   *
   * @throws \LogicException
   *   When the attribute class does not allow for multiple providers.
   */
  protected function prepareAttributeDefinition(AttributeInterface $attribute, string $class) : void {
    if (!$attribute instanceof MultipleProviderAttributeInterface) {
      throw new \LogicException('AttributeClassDiscoveryAutomatedProviders must implement ' . MultipleProviderAttributeInterface::class);
    }
    // @see Drupal\Component\Plugin\Discovery\AttributeClassDiscovery::prepareAttributeDefinition()
    $attribute->setClass($class);
    // Loop through all the parent classes and add their providers (which we
    // infer by parsing their namespaces) to the $providers array.
    $providers = $attribute->getProviders();
    do {
      $providers[] = $this->getProviderFromNamespace($class);
    } while (($class = get_parent_class($class)) !== FALSE);
    $providers = array_diff(array_unique(array_filter($providers)), [
      'component',
    ]);
    $attribute->setProviders($providers);
  }

}