I started working on this and followed what you suggested however I'm getting errors:
```
Doctrine\Common\Annotations\AnnotationException: [Semantical Error] The annotation "@Zoop\Shard\Annotation\Annotations\Unserialilzer\Collection" in property Zoop\Shard\Test\Serializer\TestAsset\Document\Post::$arrayTags does not exist, or could not be auto-loaded.

/mnt/www/shard/vendor/doctrine/annotations/lib/Doctrine/Common/Annotations/AnnotationException.php:54
/mnt/www/shard/vendor/doctrine/annotations/lib/Doctrine/Common/Annotations/DocParser.php:663
/mnt/www/shard/vendor/doctrine/annotations/lib/Doctrine/Common/Annotations/DocParser.php:600
/mnt/www/shard/vendor/doctrine/annotations/lib/Doctrine/Common/Annotations/DocParser.php:326
/mnt/www/shard/vendor/doctrine/annotations/lib/Doctrine/Common/Annotations/AnnotationReader.php:231
/mnt/www/shard/vendor/doctrine/mongodb-odm/lib/Doctrine/ODM/MongoDB/Mapping/Driver/AnnotationDriver.php:152
/mnt/www/shard/vendor/doctrine/common/lib/Doctrine/Common/Persistence/Mapping/Driver/MappingDriverChain.php:103
/mnt/www/shard/vendor/doctrine/mongodb-odm/lib/Doctrine/ODM/MongoDB/Mapping/ClassMetadataFactory.php:153
/mnt/www/shard/vendor/doctrine/common/lib/Doctrine/Common/Persistence/Mapping/AbstractClassMetadataFactory.php:318
/mnt/www/shard/vendor/doctrine/common/lib/Doctrine/Common/Persistence/Mapping/AbstractClassMetadataFactory.php:211
/mnt/www/shard/vendor/doctrine/mongodb-odm/lib/Doctrine/ODM/MongoDB/DocumentManager.php:278
/mnt/www/shard/lib/Zoop/Shard/Serializer/Serializer.php:108
/mnt/www/shard/lib/Zoop/Shard/Serializer/Serializer.php:57
/mnt/www/shard/tests/Zoop/Shard/Test/Serializer/SerializerCollectionTest.php:49
```
https://github.com/zoopcommerce/shard/pull/39/files#diff-f9dfab97334ac5ad5fa7eefe3135888cR34