doctrine：mongodb：generate：documents找不到包

I want to generate Getters and Setters for specific document in bundle. It works for entire bundle

php bin/console doctrine:mongodb:generate:documents AppBundle

but I can't find out how to specify one document. Entity class is located at

src/AppBundle/Document/Settings/Settings.php

No one of these worked:

php bin/console doctrine:mongodb:generate:documents AppBundle:Settings
php bin/console doctrine:mongodb:generate:documents AppBundle:Document:Settings:Settings
php bin/console doctrine:mongodb:generate:documents AppBundle\Settings

EDIT:

There is --document option that do the trick

php bin/console doctrine:mongodb:generate:documents AppBundle --document Settings