<@U6QF4BK4H> no. it’s perfectly fine to define ext...

# codingconventions

[yole]

@joscha.alisch no. it’s perfectly fine to define extension functions for your own classes too, if the code is useful only in a limited context and is not worth cluttering the API with

[stan0]

On the other hand, if it makes sense for the class to have a sum method I’d directly add it to it