Don't use this library and expect things to not break -- they inevitably will.
For the rest of you who want to go full YOLO, take a look at the tests and start reading about row types and variants. You might be interested in reading material from:
- Purescript-Variant's docs https://github.com/natefaubion/purescript-variant
- Some more about row types and Variants here: http://qiita.com/kimagure/items/eeb40541fc56b8dba2cc