Event 101

This is a nitpick, but I would prefer this variable be named `registrantEntities`.

The reason being is that there are two very similar types of objects with different purposes in the project, in this case a `Registrant` and a `RegistrantEntity`.  A `Registrant` instance is a registrant that our app has received from the client/website.  A `RegistrantEntity` is a registrant entity that has been loaded from the database.

It's helpful when scanning code to be able to look at a variable's name and quickly infer if it has come from the web client or the database.