class ConfigEntityListBuilder

class ConfigEntityListBuilder extends EntityListBuilder {
    
    /**
     * The config entity storage class.
     *
     * @var \Drupal\Core\Config\Entity\ConfigEntityStorageInterface
     */
    protected $storage;
    
    /**
     * {@inheritdoc}
     */
    public function load() {
        $entity_ids = $this->getEntityIds();
        $entities = $this->storage
            ->loadMultipleOverrideFree($entity_ids);
        // Sort the entities using the entity class's sort() method.
        // See \Drupal\Core\Config\Entity\ConfigEntityBase::sort().
        uasort($entities, [
            $this->entityType
                ->getClass(),
            'sort',
        ]);
        return $entities;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getDefaultOperations(EntityInterface $entity) {
        
        /** @var \Drupal\Core\Config\Entity\ConfigEntityInterface $entity */
        $operations = parent::getDefaultOperations($entity);
        if ($this->entityType
            ->hasKey('status')) {
            if (!$entity->status() && $entity->hasLinkTemplate('enable')) {
                $operations['enable'] = [
                    'title' => t('Enable'),
                    'weight' => -10,
                    'url' => $this->ensureDestination($entity->toUrl('enable')),
                ];
            }
            elseif ($entity->hasLinkTemplate('disable')) {
                $operations['disable'] = [
                    'title' => t('Disable'),
                    'weight' => 40,
                    'url' => $this->ensureDestination($entity->toUrl('disable')),
                ];
            }
        }
        return $operations;
    }
    
    /**
     * Gets the config entity storage.
     *
     * @return \Drupal\Core\Config\Entity\ConfigEntityStorageInterface
     *   The config storage used by this list builder.
     */
    public function getStorage() : ConfigEntityStorageInterface {
        return $this->storage;
    }

}