__construct（）必须是Doctrine \ Common \ Persistance \ ObjectManager的实例

我使用Objectmanger使用Doctrine ..我创建了objectManager的实例，我创建了服务但是我有这个bug：

可捕获致命错误：传递给Tag \ TagBundle \ Form \ Types \ TagsType :: __ construct（）的参数1必须是Doctrine \ Common \ Persistance \ ObjectManager的实例，Doctrine \ ORM \ EntityManager的实例，在/ var /中调用www / html / TagProject / var / cache / dev / appDevDebugProjectContainer.php在第2412行并定义

代码TagsType：

<?php 

    namespace Tag\TagBundle\Form\Types;

    use Symfony\Component\Form\AbstractType;
    use Symfony\Component\Form\Extension\Core\Type\TextType;
    use Tag\TagBundle\Form\DataTransformer\TagsTransformer;
    use Symfony\Bridge\Doctrine\Form\DataTransformer\CollectionToArrayTransformer;
    use Symfony\Component\Form\FormBuilderInterface;
    use Doctrine\Common\Persistance\ObjectManager;

    class TagsType extends AbstractType {

    /**
     * @var ObjectManager
     */

    private $manager;

    public function __construct(ObjectManager $manager){
        $this->manager = $manager;
    }

        public function buildForm(FormBuilderInterface $builder, array $options){
            $builder
                    ->addModelTransformer(new CollectionToArrayTransformer(),true)
                    ->addModelTransformer(new TagsTransformer($this->manager),true);
        }

        public function getParent(){
            return TextType::class;
        }

    }

代码TagsTransformer：

<?php 

            namespace Tag\TagBundle\Form\DataTransformer;

            use Symfony\Component\Form\DataTransformerInterface;
            use Tag\TagBundle\Entity\Tag;
            use Doctrine\Common\Persistance\ObjectManager;

            class TagsTransformer implements DataTransformerInterface {


            /**
             * @var ObjectManager
             */

            private $manager;

            public function __construct(ObjectManager $manager){
                $this->manager = $manager;
            }

            public function transform($value) {
                dump($value);
                return implode(',',$value);
            }

                public function reverseTransform($string)
                {
                    $names = explode(',',$string);
                    $tags = $this->manager->getRepository('TagBundle:Tag')->findBy(['name' => $names]);
                    $newNames = array_diff($names, $tags);
                    foreach($names as $name){
                        $tag = new tag();
                        $tag->setName($name);
                        $tags[] = $tag;
                    }
                    return $tags;
                }
            }

代码services.yml：

services:
  tag.form.types.tages:
    class: Tag\TagBundle\Form\Types\TagsType
    arguments: ["@doctrine.orm.entity_manager"]
    tags:
      - { name: form.type }
#    tag.example:
#        class: Tag\TagBundle\Example
#        arguments: ["@service_id", "plain_value", "%parameter%"]