Shopify/active_merchant — pull request #1122 by lulalala (2014-04-15 15:06:47+00:00)
Title: Documenting integration helper methods.

I am trying to document the usage of integration gateways. I am not an expert so please review because my understanding could be wrong. Please also advice styling preferences if you have any. Cheers.

I do this because after a year I had to relearn by reading codes each of the methods.