Django-rest-framework: Provide a way to avoid circular import of serializers

Its a common case where you have modules where both refer to each other.

For example, modules users and posts. On users you have User and on posts you have Post and Attachment

# users
class UserSerializer:
    posts = PostSerializer()
    profile_attachments = AttachmentSerializer()


#posts
class PostSerializer:
    user = StringSerializer()
    attachments = AttachmentSerializer()

class AttachmentSerializer:
    name = CharField()
    size = IntegerField()

In Django there's a way to declare Foreign Keys that avoids circular dependencies, declaring the referenced model by a string:

profile_attachment = models.ForeignKey('posts.Attachment', on_delete=models.CASCADE)

Could DRF offer something like that for serializers? Something like

profile_attachment = ModelSerializer(serializer='posts.AttachmentSerializer')