setUninstalling example

  public function uninstall($type, $name) {
    $entities = $this->getConfigEntitiesToChangeOnDependencyRemoval($type, [$name], FALSE);
    // Fix all dependent configuration entities.     /** @var \Drupal\Core\Config\Entity\ConfigEntityInterface $entity */
    foreach ($entities['update'] as $entity) {
      $entity->save();
    }
    // Remove all dependent configuration entities.     foreach ($entities['delete'] as $entity) {
      $entity->setUninstalling(TRUE);
      $entity->delete();
    }

    $config_names = $this->configFactory->listAll($name . '.');
    foreach ($config_names as $config_name) {
      $this->configFactory->getEditable($config_name)->delete();
    }

    // Remove any matching configuration from collections.     foreach ($this->activeStorage->getAllCollectionNames() as $collection) {
      $collection_storage = $this->activeStorage->createCollection($collection);