It looks like there are no entries to the gallery yet. Do you have any custom validations of your own? Be the first one to submit!
Please create a gist with the custom validation and provide documentation of it by using comments on that file or even better, provide a secondary file as a README.md so you can better document it.
Then create a PR adding it to this file providing a ### Title, link to the gist and small description so it's easier to know at a glace what it is about without having to open the gist.