Is it possible to use this with FactoryBoy?

It would be useful to see an example of how to use pytest-flask-sqlalchemy with FactoryBoy/pytest-factoryboy, if they can work together. For example, I'm not clear what would be used for factory classes' `sqlalchemy_session` field.

(Background: I use something like pytest-flask-sqlalchemy in my tests, and would like to switch to pytest-flask-sqlalchemy when the MySQL PR is included, and would also like to use FactoryBoy, but have never managed to get the two things to work well together.)