/**
  * @param Container         $container
  * @param MultipleFieldType $fieldType
  * @param                   $key
  */
 public function json(Container $container, MultipleFieldType $fieldType, $key)
 {
     /* @var Collection $config */
     $config = $this->dispatch(new GetConfiguration($key));
     $fieldType->mergeConfig($config->all());
     /* @var EloquentModel $model */
     $model = $container->make($config->get('related'));
     $data = [];
     /* @var EntryInterface $item */
     foreach ($model->all() as $item) {
         $data[] = (object) ['id' => $item->getId(), 'text' => $item->getTitle()];
     }
     return $this->response->json($data);
 }