CanCan::Ability where is the current_user method defined?

Question

Pretty much what I have mentioned in the title. I am using CanCan::Ability in my code to check permissions and abilities. It expects a current_user method to be defined. I am gu

Answer 1

It's found here in the source code. It's nothing to do with devise, though. The documentation is found above the method and describes overwriting it.