Adding nesting blueprints

[TheGrandmother]

Is it possible to add a blueprint to a blueprint?
I want to be able to do the following:

import dataset_bp
bp = Blueprint('process_leafs', url_prefix='process_leafs')
# Stuff
bp.blueprint(dataset_bp, url_prefix='/<uuid>/dataset')

in order to be be to use the endpoint /process_leafs/420/dataset

Afaik there is no such feature.
I think this would be really really nice to have.
Since it is not only neat but it would enable code reuse, since for example many resources in the API might also have datasets as per this example.

Right now I'm going to do this through some light workarounding but it would be a glorious feature.

[TheGrandmother]

Hmmm.... apparently something like this exists in the code:
https://github.com/channelcat/sanic/blob/30e6a310f132752669a74927530e8bc52a51e98e/sanic/blueprints.py#L41

But it is not mentioned in the docs. Will look into it and update the documentation.

[TheGrandmother]

This is possible to do via the group method.
Is the docs pointing to the wrong version related to #1245 ?