Maxime Séguin

We need this for the [koco project](https://github.com/cbcrc/generator-koco) & [koco-i18next module](https://github.com/cbcrc/koco-i18next). We might try to fork + pull request if we find the time to do it. :+1:

I don't think so. I want to create a reusable custom validation rule. The message logic shouldn't have to be specified/re-specified every time someone uses this custom validation rule. I...

Yes please! :+1: