See here for an example of how to use these decorators:
https://github.com/edx/bok-choy/blob/master/tests/pages.py#L223-L259

If you're following the Page Object design pattern, then you should apply these decorators to the appropriate page object (a subclass of `bok_choy.page_object.PageObject`).  I started to put together docs with some guidelines for this, but I don't think they got merged: https://github.com/edx/bok-choy/pull/31