Package play.data does not exist

I’m trying to get Ebean working with Play using the Gradle plugin, and I added the lines to the build script as described here: http://stackoverflow.com/questions/32478579/using-playframework-ebean-with-gradle

While attempting to create my first model class, I can’t seem to import anything from play.data package or any of its sub-packages. It always complains that the play.data package doesn’t exist.

Am I missing something?